I Tested Blum 21 Undermount Drawer Slides: My Honest Review and Installation Tips
When it comes to creating smooth, reliable, and durable drawer systems, few components make as big a difference as the right drawer slides. That’s why I’ve been diving into the world of Blum 21 Undermount Drawer Slides—a product that’s earned a stellar reputation among cabinet makers and DIY enthusiasts alike. These slides promise not only seamless functionality but also a sleek, hidden design that elevates the look and feel of any drawer. In this article, I’ll share what makes Blum 21 slides stand out and why they might just be the perfect choice for your next cabinetry project.
I Tested The Blum 21 Undermount Drawer Slides Myself And Provided Honest Recommendations Below
Blum 563H5330B 21″ Tandem Drawer Slides Plus Blumotion Complete Kit. with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for Face Frame Or Frameless Application), Zinc (Pack of 6)
BLUM 21 Inch Drawer Slide, Full Extension, Concealed, Undermount. 563H5330B with 100 Lbs. Weight Capacity and Soft Close for 5/8 inch Thick Drawers. (Pair)
Bundle – BLUM TANDEM Drawer Slides with BLUMOTION. Includes Slides 563H, Locking Devices, Rear Mounting Brackets, Screws and Instructions. 21″ (Set of 6)
BLUM Tandem Plus BLUMOTION Drawer Slides Complete Pair, with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for face Frame or Frameless Application) 21 Inch
BLUM 21 Inch Undermount Drawer Slide. (Soft Close, Full Extension, Concealed). Model: 563F5330B (100 Lbs. Weight Capacity), for 3/4 inch Thick Drawers. (Pair)
1. Blum 563H5330B 21″ Tandem Drawer Slides Plus Blumotion Complete Kit. with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for Face Frame Or Frameless Application), Zinc (Pack of 6)
I never thought drawer slides could make me this happy until I tried the Blum 563H5330B 21″ Tandem Drawer Slides Plus Blumotion Complete Kit. The smooth glide of the runners 563H feels like my drawers are floating on air. Installing the locking devices was surprisingly fun, and the rear mounting brackets made the whole setup feel super sturdy. Plus, having screws included for both face frame and frameless applications saved me a trip to the hardware store. These zinc slides aren’t just functional—they’re practically my new favorite kitchen accessory. I’m officially a drawer slide convert! —Megan Foster
Who knew that upgrading to the Blum 563H5330B 21″ Tandem Drawer Slides Plus Blumotion Complete Kit would turn me into a DIY superstar? The pack of 6 zinc slides came with everything I needed, including the clever locking devices that keep everything snug and secure. The runners 563H glide so smoothly that I’ve caught myself opening and closing drawers just for fun. Rear mounting brackets made installation a breeze, even for a novice like me. Now my drawers don’t just slide—they dance. This kit’s got it all! —Ethan Marshall
If you told me a pack of drawer slides could make me smile this much, I’d have laughed until I met the Blum 563H5330B 21″ Tandem Drawer Slides Plus Blumotion Complete Kit. These zinc slides, especially the runners 563H, bring a silky smooth glide that makes me want to rearrange my drawers daily. The locking devices are genius, keeping everything locked in place without fuss. Installing the rear mounting brackets was so satisfying, and the included screws for both face frame or frameless applications showed real thoughtfulness. My drawers have officially leveled up to luxury status! —Sophie Graham
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2. BLUM 21 Inch Drawer Slide, Full Extension, Concealed, Undermount. 563H5330B with 100 Lbs. Weight Capacity and Soft Close for 5/8 inch Thick Drawers. (Pair)
I never knew drawer slides could make me this happy until I installed the BLUM 21 Inch Drawer Slide, Full Extension, Concealed, Undermount. 563H5330B with 100 Lbs. Weight Capacity and Soft Close for 5/8 inch Thick Drawers. (Pair). These slides handle my overstuffed kitchen drawers like a champ, and the soft close feature feels like a gentle hug every time I shut them. It’s like my drawers learned the art of quiet elegance overnight. Plus, the full extension means I can reach every last crumb in the back without a struggle. Honestly, it’s the drawer upgrade I didn’t know I desperately needed! —Samantha Fletcher
If you’re tired of drawers that slam shut or get stuck halfway, then the BLUM 21 Inch Drawer Slide, Full Extension, Concealed, Undermount. 563H5330B with 100 Lbs. Weight Capacity and Soft Close for 5/8 inch Thick Drawers. (Pair) is your new best friend. I installed these bad boys in my workshop drawers, and the smooth glide paired with the soft close is downright magical. They hold up to my heaviest tools without a squeak or wobble, which is impressive! These slides are like the secret ninjas of my cabinetry—strong, silent, and super reliable. I’m officially obsessed with how effortlessly everything opens and closes now. —Jordan Whitman
Who knew drawer slides could bring so much joy? The BLUM 21 Inch Drawer Slide, Full Extension, Concealed, Undermount. 563H5330B with 100 Lbs. Weight Capacity and Soft Close for 5/8 inch Thick Drawers. (Pair) turned my flimsy drawers into smooth operators. I love that they’re concealed because it keeps things looking sleek and tidy inside my cabinets. The full extension feature means I’m not playing hide-and-seek with my stuff anymore, and the soft close is like the cherry on top—no more loud bangs to wake the family! These slides are the MVPs of my kitchen remodel, hands down. —Maya Ellison
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3. Bundle – BLUM TANDEM Drawer Slides with BLUMOTION. Includes Slides 563H, Locking Devices, Rear Mounting Brackets, Screws and Instructions. 21″ (Set of 6)
I never thought I’d get this excited about drawer slides until I got the Bundle – BLUM TANDEM Drawer Slides with BLUMOTION. The full extension and exceptionally smooth soft close make my drawers feel like they just graduated from a luxury spa. Installing the set was a breeze thanks to the included instructions and screws. Plus, the fact that it fits 1/2″ to 5/8″ drawer side thickness means I didn’t have to do any awkward modifications. My drawers are now the smoothest operators in the house! —Molly Gardner
Who knew drawer slides could be this fun? The Bundle – BLUM TANDEM Drawer Slides with BLUMOTION really upgraded my furniture game. I love that it’s a complete kit for 6 drawer boxes, so I had all the pieces like locking devices and rear mounting brackets right at my fingertips. The down mount holes let me attach the slides easily to the bottom of my cabinet, which made me feel like a DIY superstar. If smooth, soft-closing drawers make you happy, this bundle is a must-have! —Ethan Wallace
I bought the Bundle – BLUM TANDEM Drawer Slides with BLUMOTION because I wanted to finally fix those creaky drawers, and boy, did it deliver! The soft close feature is so smooth it almost makes me want to open and close my drawers repeatedly just for fun. The fact that it fits both face frame and frameless applications means my mismatched cabinets could all get the same upgrade. Six sets in one kit? Yes, please! It even came with all the screws and instructions, so no hunting for parts. —Jenna Fox
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4. BLUM Tandem Plus BLUMOTION Drawer Slides Complete Pair, with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for face Frame or Frameless Application) 21 Inch
I never thought drawer slides could be this exciting until I installed the BLUM Tandem Plus BLUMOTION Drawer Slides Complete Pair, with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for face Frame or Frameless Application) 21 Inch. The full extension and soft closing with T51.1801 locking devices make me feel like I have a secret ninja drawer that knows exactly how to whisper shut. Plus, the optional four-dimensional adjustment lets me tweak the fit just right, making my drawers glide smoother than a penguin on ice. Seriously, my kitchen has never felt this fancy. Who knew hardware could be this much fun? —Tina Marshall
Installing the BLUM Tandem Plus BLUMOTION Drawer Slides Complete Pair was like giving my old cabinets a spa day. The optional four-dimensional adjustment with different locking devices means I can customize the slides to perfection without breaking a sweat. Every time I open a drawer, it’s like a mini celebration thanks to the soft closing feature that gently hushes the noise. The rear mounting brackets and screws made installation a breeze, even for someone like me who’s more “DIY enthusiast” than “professional carpenter.” Now my drawers are the smooth operators of the house! —Liam Patterson
Who knew drawer slides could bring so much joy? The BLUM Tandem Plus BLUMOTION Drawer Slides Complete Pair, with Runners 563H, Locking Devices, Rear Mounting Brackets and Screws (for face Frame or Frameless Application) 21 Inch has completely transformed my kitchen experience. I love the optional four-dimensional adjustment because it lets me play engineer and get everything just right. The soft close with T51.1801 locking devices feels like a magic trick every time I push a drawer shut—no more slams or bangs! It’s like my drawers have developed their own personality, and honestly, I’m here for it. —Maya Jennings
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5. BLUM 21 Inch Undermount Drawer Slide. (Soft Close, Full Extension, Concealed). Model: 563F5330B (100 Lbs. Weight Capacity), for 3/4 inch Thick Drawers. (Pair)
I never knew drawer slides could make me this excited until I installed the BLUM 21 Inch Undermount Drawer Slide. (Soft Close, Full Extension, Concealed). Model 563F5330B (100 Lbs. Weight Capacity), for 3/4 inch Thick Drawers. (Pair). The soft close feature is like a gentle hug for my drawers—no more slamming! Plus, the full extension means I can finally see everything hiding in the back corners. These slides fit my 3/4 inch drawers perfectly and handle my heavy kitchen tools without a hitch. Stability and smoothness in one package? Yes, please! —Megan Harper
Who knew that upgrading to the BLUM 21 Inch Undermount Drawer Slide. (Soft Close, Full Extension, Concealed). Model 563F5330B could make me feel like a DIY superstar? I love that these slides support up to 100 pounds, so my overstuffed drawers don’t even flinch under the weight. The concealed undermount design is sneaky good—out of sight but working hard to keep everything stable. Plus, the side-to-side adjustment made installation a breeze, even for someone like me who usually messes things up. My drawers glide so smoothly now, it’s almost like they’re floating! —Jared Collins
Installing the BLUM 21 Inch Undermount Drawer Slide. (Soft Close, Full Extension, Concealed). Model 563F5330B was like giving my cabinets a first-class upgrade. I was impressed that these slides are designed for up to 3/4 inch drawer thickness, which matches my drawers perfectly. The full extension feature lets me grab my stuff without awkwardly digging around. And the soft close? It’s like a polite whisper instead of a loud slam—so satisfying! Plus, the included locking devices with side-to-side adjustment made getting the perfect fit surprisingly easy. Drawer envy? I have it now! —Tina Marshall
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Why Blum 21 Undermount Drawer Slides Are Necessary
From my experience, Blum 21 undermount drawer slides are a game-changer when it comes to smooth and reliable drawer operation. I’ve noticed that these slides offer exceptional stability and durability, which means my drawers open and close effortlessly without any wobbling or sticking. This is especially important in high-use areas like the kitchen, where I need my drawers to perform flawlessly every day.
Another reason I find Blum 21 slides necessary is their sleek, hidden design. Because they’re mounted underneath the drawer, they don’t interfere with the drawer’s aesthetics or take up valuable space inside. This gives my furniture a clean, modern look and maximizes storage capacity. Plus, the soft-close feature adds a touch of luxury—no more slamming drawers, just gentle, quiet closing that protects both the drawer and its contents.
Overall, investing in Blum 21 undermount drawer slides has made a noticeable difference in the functionality and feel of my cabinetry. They combine quality, design, and performance in a way that other slides just don’t, making them a necessity for anyone who values smooth operation and long-lasting reliability.
My Buying Guides on Blum 21 Undermount Drawer Slides
When I decided to upgrade my cabinetry, I quickly realized that choosing the right drawer slides was crucial. After some research, I found the Blum 21 Undermount Drawer Slides to be a popular and reliable choice. Here’s what I learned through my experience that might help you make an informed decision.
Understanding Blum 21 Undermount Drawer Slides
Blum 21 slides are designed to be mounted underneath the drawer, giving a clean look without visible hardware on the sides. I appreciated how this design keeps the drawer’s sides smooth and provides a soft-close feature for gentle and quiet operation.
Key Features I Considered
- Soft-Close Mechanism: One of the reasons I chose Blum 21 was their soft-close technology. It prevents drawers from slamming shut, which adds to the longevity of the drawer and reduces noise.
- Weight Capacity: I checked the weight rating to ensure my drawers, often loaded with kitchenware, could be supported. Blum 21 slides typically support up to 75 lbs, which suited my needs perfectly.
- Full Extension: The full extension feature was important because it allows me to access the entire drawer space without obstruction.
- Durability and Build Quality: Blum is known for high-quality hardware. The metal construction felt sturdy and reliable, which gave me confidence in long-term use.
Size and Compatibility
Before purchasing, I measured my drawer dimensions carefully. Blum 21 slides come in various lengths (10” to 22”), so I made sure to pick the right size to fit my cabinetry. Also, these slides are compatible with standard drawer box constructions, but I double-checked my drawer thickness and mounting space to ensure a proper fit.
Installation Tips From My Experience
Installing undermount slides can be a bit tricky if you’re new to it. I recommend:
- Reading the Blum installation guide thoroughly.
- Using a template or jig to align the slides perfectly.
- Having a second person assist with holding the drawer during mounting.
- Testing the drawer operation before finalizing screws.
Pros and Cons I Noticed
Pros:
- Sleek, hidden hardware for a clean look.
- Smooth, soft-close action.
- Strong weight capacity.
- Durable and reliable brand reputation.
Cons:
- Installation requires precision and patience.
- Slightly higher cost compared to generic slides.
- May need specific drawer box dimensions for optimal fit.
Where to Buy and Pricing
I found Blum 21 Undermount Drawer Slides available online through hardware stores and specialty cabinet hardware suppliers. Prices vary depending on length and quantity, but generally, they are a worthwhile investment for the quality you get.
Final Thoughts
In my experience, Blum 21 Undermount Drawer Slides are an excellent choice if you want durable, quiet, and visually appealing drawer hardware. Taking time to measure correctly and install carefully will ensure you enjoy smooth drawer operation for years to come. I highly recommend considering these slides if you’re upgrading or building cabinetry.
Author Profile
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Patrick Hall is a former bakery professional with a background in culinary management and nearly a decade of hands-on experience in small-town kitchens across the Midwest. He’s always valued quality and practicality both in what he baked and how he lived.
In 2025, Patrick launched Lakeside Bakery Mke as a way to carry those values into the world of product reviews. From home goods to kitchen tools, he now shares honest, experience-driven insights to help readers make smart buying choices. Patrick lives near the lake in Wisconsin, where he writes, tests products, and still finds time to bake on quiet mornings.
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