--- product_id: 27481492 title: "21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity" brand: "custom service hardware" price: "€ 102.12" currency: EUR in_stock: true reviews_count: 8 category: "Custom Service Hardware" url: https://www.desertcart.pt/products/27481492-21-in-soft-close-full-extension-undermount-drawer-slides-85 store_origin: PT region: Portugal --- # 21-inch full extension Soft-close mechanism 85 lb weight capacity 21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity **Brand:** custom service hardware **Price:** € 102.12 **Availability:** βœ… In Stock ## Summary > πŸ”§ Upgrade your space with smooth, silent strength β€” because your drawers deserve the best! ## Quick Answers - **What is this?** 21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity by custom service hardware - **How much does it cost?** € 102.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/27481492-21-in-soft-close-full-extension-undermount-drawer-slides-85) ## Best For - custom service hardware enthusiasts ## Why This Product - Trusted custom service hardware brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Heavy-Duty Strength:** Supports up to 85 pounds, perfect for your heaviest kitchen or office drawers. - β€’ **Seamless Full Extension:** Enjoy complete drawer access with smooth 21-inch slides designed for maximum reach. - β€’ **Sleek Undermount Design:** Hidden installation for a clean, modern cabinet look that impresses guests. - β€’ **Versatile Compatibility:** Optimized for 1/2" and 5/8" drawer sides, fitting most standard cabinetry setups. - β€’ **Whisper-Quiet Soft Close:** No more slammingβ€”experience gentle, silent drawer closing every time. ## Overview These 21-inch undermount drawer slides feature a durable chromate finish and a soft-close ball bearing system that supports up to 85 pounds. Designed for 1/2" and 5/8" drawer sides, they provide full extension and quiet operation, enhancing both functionality and style in face frame or frameless cabinets. Screws are not included. ## Description The 3300 series undermount drawer slide has a chromate finish and a soft-close design that ensures your drawers will never slam shut. The drawer is full extension and can support up to 85 lbs. It also includes front clips and back sockets. Please note that screws are NOT included. Review: A low cost alternative the the big name drawer slides - The owner previous to us had refaced the kitchen cabinets, but left the old particle board drawers in place. Drawer support consisted of a pair of side rollers and a central, under mount plastic on metal slider. All in all, pretty nasty. We upgraded the drawer boxes, keeping the drawer fronts. We looked at the big name slides, but were put off by the price. I bought one pair of these to give them a try. They didn't have the full range of adjustability you'd get by spending more, but they do the job. I then bought enough for the whole kitchen. We've been using them for several months, and they work just fine. You get smooth movement, full extension with soft closing for a not too much money. If there's a downside to them, it's that these are supplied with the bare minimum of instructions. Review: great product - Arrive much quicker than I expected, well made and heavy duty. Just like other viewers said, no instruction and no screws. I have screws in my shop and slides are easy enough for beginners, so not an issue. Many YouTube videos don't talk about dimension so I have to figure this out myself. The 21" is for the drawer length, a few of my drawers are the right length so no adjustment needed, others are shorter so I just added wood stripes to make it work. The overall slide length is 22" without the metal plate, my cabinet is 22 1/2" measured from the wall with 3/4" molding (which is 1/4" shorter than needed length), so I cut a bit of molding from inner portion to fit. Overall, great product! ## Features - Designed for use with 1/2 in. and 5/8 in. drawer box sides (Not designed for 3/4 in. drawer box sides) - Drawer slide can be mounted under drawer boxes with a length of 21 in. - Minimum/Maximum Cabinet Depth 21-7/8 in. - 23-3/4 in. - Full extension undermount ball bearing slide with built-in soft closed mechanism can be used for face frame and frameless cabinets - 85 lbs. static weight capacity - Screws Not included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01C97YOU8 | | Best Sellers Rank | #1,264,023 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,333 in Cabinet & Furniture Drawer Slides | | Brand | Custom Service Hardware | | Brand Name | Custom Service Hardware | | Color | Chromate | | Customer Reviews | 4.2 out of 5 stars 101 Reviews | | Drawer Type | undermount ball bearing soft-close | | Finish Type | Chromate | | Finish Types | Chromate | | Included Components | Comes as a Combo Set | | Item Type Name | Drawer Slides | | Manufacturer | Custom Service Hardware | | Manufacturer Part Number | 39.3300.21 | | Material | Metal | | Material Type | Metal | | Maximum Weight Capacity | 85 pounds | | Model Number | 39.3300.21 | | Mounting Type | Under Mount | | Number of Items | 1 | | UPC | 841572117129 | | Unit Count | 1 Count | | Weight Limit | 85 pounds | ## Images ![21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity - Image 1](https://m.media-amazon.com/images/I/519Fb1jpaLL.jpg) ![21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity - Image 2](https://m.media-amazon.com/images/I/41Z6eBhpURL.jpg) ![21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity - Image 3](https://m.media-amazon.com/images/I/61jeN4CEwCL.jpg) ![21 in. Soft Close Full Extension Undermount Drawer Slides 85 lb Capacity - Image 4](https://m.media-amazon.com/images/I/51iYy-m2KeL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A low cost alternative the the big name drawer slides *by A***R on January 3, 2019* The owner previous to us had refaced the kitchen cabinets, but left the old particle board drawers in place. Drawer support consisted of a pair of side rollers and a central, under mount plastic on metal slider. All in all, pretty nasty. We upgraded the drawer boxes, keeping the drawer fronts. We looked at the big name slides, but were put off by the price. I bought one pair of these to give them a try. They didn't have the full range of adjustability you'd get by spending more, but they do the job. I then bought enough for the whole kitchen. We've been using them for several months, and they work just fine. You get smooth movement, full extension with soft closing for a not too much money. If there's a downside to them, it's that these are supplied with the bare minimum of instructions. ### ⭐⭐⭐⭐⭐ great product *by Y***N on May 17, 2017* Arrive much quicker than I expected, well made and heavy duty. Just like other viewers said, no instruction and no screws. I have screws in my shop and slides are easy enough for beginners, so not an issue. Many YouTube videos don't talk about dimension so I have to figure this out myself. The 21" is for the drawer length, a few of my drawers are the right length so no adjustment needed, others are shorter so I just added wood stripes to make it work. The overall slide length is 22" without the metal plate, my cabinet is 22 1/2" measured from the wall with 3/4" molding (which is 1/4" shorter than needed length), so I cut a bit of molding from inner portion to fit. Overall, great product! ### ⭐⭐⭐⭐ Exact fit as Blum but less expensive. *by A***A on October 2, 2018* The slides work great. The pull is a little harder to open than I expected but price is more reasonable than the Blum slides. I ordered 4 slides and they came in short order and no damage. I used the Blum slide guide to build my drawers. Exact fit. Side note, I would dovetail my 1/2" drawers instead of using the Kreg jig and 1" screws when I do this again. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/27481492-21-in-soft-close-full-extension-undermount-drawer-slides-85](https://www.desertcart.pt/products/27481492-21-in-soft-close-full-extension-undermount-drawer-slides-85) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-01*