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21″ Undermount Soft Close Drawer Slides – Concealed Full Extension Bottom Mount Runners with Locking Device,100 LB Capacity,Fits Face Frame & Frameless Cabinets,Ideal for Kitchen,Multi-Purpose Drawers

Based on 92 reviews
Condition: New
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$68.98

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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Nov 19
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At a glance

Condition
New
Size
21inch-533mm
Model
UN-21in-4
Dimensions
21"L x 2.16"W x 2.16"Th
Color
Silver
Material
Alloy Steel
Finish Type
Zinc Plated
In the box
4 pairs of undermount drawer slides,mounting screws,8pcs Brackets,8pcs Locking Device

Features 6

  • Whats in the box? You get 4 pairs (8 pieces) of 21" undermount soft close drawer slides, with mounting screws, adjustable locking devices and brackets for easy installation.
  • [Measurement]:21"(533mm) under mount soft close drawer slide,inside cabinet length(min):568mm,inside cabinet length(max):588mm.Load Capacity: 85LB.The maximum thickness of the side panel of the applicable drawer is 16mm (5/8)(not recommended for 3/4 inch material.). Clearance between slides with cabinet: 20mm (0.78inch)- 40mm (1.58inch).
  • Are these drawer slides durable and quiet? Made from high-grade cold rolled steel with zinc plating, these slides provide smooth and quiet soft close action and corrosion resistance for daily use.
  • Can I fully access my drawer and remove it easily? Yes. The 3-fold full extension design allows complete access to drawer contents, and the adjustable locking device lets you remove the drawer quickly for cleaning or maintenance. Slides Width: 2.16" (55mm)--length:21" (533mm)--Fully extended length:40"(990mm).

Description

Sulawskys drawer slides are available in 10inch, 12inch,14inch,16inch,18inch,20inch,22inch. soft closed drawer slides 4 pairs (8pcs), 10inch,12inch,14inch,16inch,18inch,20inch,22inch soft close drawer slides 1 pair (2pcs). 10inch,12inch,14inch,16inch,18inch,20inch,22inch. Undermount drawer slides 4 pairs(8pcs),And match with 12pcs screws each pair. Sulawskys drawer slides are available in 12inch, 15inch,18inch,21inch. Can be applied to:American-style cabinets,Such as cabinetry, desk pedestals,office,drawers TV cabinet,beside tables and general storage drawers. lnstall and Disassemble Easily The drawer can be install and disassemble by the adjustable locking device easily. it's convenient to take the drawer outfor installation or cleaning. Make sure the slides are leveled during the installation process Place the base slides stay with the front edge of cabinet Mount the screws in the permanent mounting holes Adjust the inner member.Mount the screws in the permanent mounting holes Adopts a new copper hydraulic bufferdouble-spring structure, thus reducing noise when closing the drawer. The practical hook design makes the drawer more secure when opening and closing and prevents the drawer from sliding inward. The electroplated layer can prevent direct contact between the air and the track steel plate, thereby resisting oxidation and corrosion. The rails are positioned with multiple holes for sturdiness Made of thick steel plate, high density, high strength, load-bearing capacity up to 45kg/100 lb. Ensure the selected size < the drawerlength, Reserve 0.5 " ofspace for mounting on both sides. Suitable for drawer depth of 10" - 22"

Specs 17

Color Silver
Material Alloy Steel
Brand Sulawskys
Product Dimensions 21"L x 2.16"W x 2.16"Th
Finish Type Zinc Plated
Brand Name Sulawskys
Manufacturer Sulawskys
Number of Items 8

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Strong drawer slides.
Size: 21inch-533mm
Built some pull outs for my kitchen cabinets and these slides were perfect for the job. Heavy duty and strong. Several of the plastic connectors were broken on the original order, but they sent me a new set and all were ok. To make these easier to install, I took the advice of others on the reviews and built a template or pattern from thin plywood, it helped me keep things square and aligned as I was installing them. Overall very happy with the results. ... show more
Reviewed in the United States on May 21, 2025 by mike wilson

Excellent slides, and price is great.
Size: 15inch-381mm
This is my second order for these slides, and none of the issues mentioned in the reviews manifested themselves in my order. These slides are well built. The method of implementing a slight drawer adjusted works quite well. If only someone wouls invent a horizontal tweaker. I would be thrilled. I deducted a star because the rear tab is too big. And for that reason, you can't drill a hole to receive the tab ... I feel you must create a "slot", and this makes for a very sloppy install. Next time I will use my angle grinder to get rid of the unneeded metal material on the tab. It's minor, but I would prefer the slot towards the front of the slide, be at the very front of the slide, where a hole now exists. A great value. ... show more
Reviewed in the United States on February 14, 2026 by David M Lee

Best and easiest drawers ever!
Size: 21inch-533mm
How did I never try this before!!! I thought this would be difficult, because I did not understand it. This is the easiest way to build drawers. It does take up more space than side mount, so I guess horses for courses. These work really well and was super easy to install.
Reviewed in the United States on April 8, 2025 by Graham S McLeod

These work ok, but it is likely better to pay for the upgrade.
Size: 15inch-381mm
This was my first time using this type of drawer slide. I like this style drawer slide and will defiantly use them again, but I will spend the money for higher quality versions. These slide do work, but they do not have the quality or fit and finish I would need for a professional job. I used these for a random project for my home, but I would not use these for anything more than that. The main issue with these is with the cheap plastic brackets that connect to the drawer. I bought a 4 pack of these slides and out of the 8 brackets, two of them were broken upon arrival. There was really no way to return just the plastic pieces, so I just rigged it to work after install. The metal slides seem ok, and they come with the back metal bracket for face frames, but they defiantly don't seem to work as well as the more expensive ones. While they are soft close, they don't seem to close very "tight" and bring the drawer face close to the drawer. There also is very little adjustability to these after install that you get with a more expensive option. As far as install, I would just ignore all the Chinese instructions. Just cut all your drawer parts oversized and then get the exact measurements after you install the slides. Once you install the slides, extend the slides and measure the space between the slides, add a extra 1/8 an inch, then use that measurement for your width of the inside panel of your drawer. ... show more
Reviewed in the United States on September 16, 2025 by Kyle

Don’t waste your time/money!!!
Size: 21inch-533mm
My recommendation is to spend the extra money on a better product. I ordered these because they looked decent in the pics and the price was good. I guess you get what you pay for. When they arrived almost half of the locking mechanisms were broke. The replacement order I received was the same way. I’m betting it’s the result of extremely cheap plastic, poorly designed component structure, or cheap packaging (which contained no padding/filler)…or all of the above. ... show more
Reviewed in the United States on February 21, 2025 by Nettie Kennedy

smooth glide
Size: 18inch-457mm
easy to install , look on youtube for instructions
Reviewed in the United States on October 2, 2025 by JermaineL

Slides are perfect fit!
Size: 18inch-457mm
Bought these drawer slides for my husband for a project he was doing for me. They worked out very well. Fit the drawers perfectly! The only negative thing I would say about them is they did not come with instructions. Thankfully my husband was able to find the instructions on line. I think he would recommend these drawer slides. ... show more
Reviewed in the United States on May 19, 2025 by Carey T.

Nice slides
Size: 18inch-457mm
Easy to install. Nice soft close mechanism. Thumbs up!
Reviewed in the United States on January 5, 2025 by Veritas
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