{"product_id":"knobonly-8-pair-21-in-soft-closing-drawer-slides-heavy-duty","title":"Knobonly 8 Pair 21 in Soft Closing Drawer Slides - Heavy Duty","description":"\u003cp\u003eIn this review of the Knobonly 8 Pair 21 in soft closing drawer slides, the bottom line is simple: these are a practical, heavy duty option for anyone rebuilding or upgrading kitchen, bathroom, or office drawers who needs a concealed undermount slide with a reliable soft close. The standout reason to buy is the combination of full extension and a cushioned three-stage soft close that protects hands and gives full drawer access while supporting up to 85 LBS. Installation is straightforward for competent DIYers, though some will find the instructions could be clearer.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull extension:\u003c\/strong\u003e The slides extend from a folded length of 21 in to a full 39 in so drawers open fully for easy access to the back.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh load capacity:\u003c\/strong\u003e Each slide supports up to 85 LBS, making this set suitable for heavy utensils, tools, or dense storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Cold rolled steel with zinc plating provides corrosion resistance and a solid feel for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft close mechanism:\u003c\/strong\u003e The three-stage cushioned close prevents slams and reduces the risk of pinched fingers, creating a quieter cabinet environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable locking device:\u003c\/strong\u003e The included locking device simplifies fitting and removal so drawers stay secure yet remain serviceable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize compatibility:\u003c\/strong\u003e Designed for 21 in drawers and cabinets 22 to 23 in deep, the slides fit common kitchen and bathroom face-frame cabinetry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is best for homeowners and contractors replacing or fitting drawers where a concealed undermount slide and full extension are desired, especially in kitchen or bathroom vanities and office furniture that need heavy load capacity. The soft close feature and sturdy steel construction make these slides well suited for drawers that get daily use.\u003c\/p\u003e\u003cp\u003eThese slides are less appropriate for extremely shallow cabinets, custom drawers that are not 21 in long, or users who need ultra-detailed printed instructions; some buyers reported mixed experiences with installation guidance and missing hardware in isolated cases, so those who need plug-and-play simplicity may prefer kits that include step-by-step templates.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFull 39 in extension gives complete drawer access for organized storage.\u003c\/li\u003e\n\u003cli\u003eSolid zinc-plated cold rolled steel construction feels durable and resists rust.\u003c\/li\u003e\n\u003cli\u003eSoft close cushioning prevents slams and reduces noise in daily use.\u003c\/li\u003e\n\u003cli\u003eHigh 85 LBS capacity supports heavy contents without sagging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInstallation guidance is mixed; some users find instructions unclear or wish for a clearer hardware checklist.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for 21 in drawers and 22-23 in cabinet depths, so it is not a universal fit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eFolded slide length\u003c\/td\u003e\n\u003ctd\u003e21 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull extension length\u003c\/td\u003e\n\u003ctd\u003e39 in (1001 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable cabinet depth\u003c\/td\u003e\n\u003ctd\u003e22 in to 23 in (566-586 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable drawer length\u003c\/td\u003e\n\u003ctd\u003e21 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew length\u003c\/td\u003e\n\u003ctd\u003e0.55 in (14 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial and finish\u003c\/td\u003e\n\u003ctd\u003eCold rolled steel, zinc plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax load capacity\u003c\/td\u003e\n\u003ctd\u003e85 LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Knobonly 21 in undermount soft closing slides are a sensible value for anyone who needs heavy duty, full extension concealed rails with a reliable soft close. They deliver solid construction and useful capacity for kitchen and bathroom drawers, and while installation instructions could be clearer, the adjustable locking device and durable finish make them a practical choice for most DIYers and professionals.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill these slides fit face-frame cabinets?\u003c\/strong\u003e\u003cbr\u003eYes; the slides are designed to fit drawers with face frames and are intended for standard 21 in drawer lengths.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat cabinet depth is required?\u003c\/strong\u003e\u003cbr\u003eThe slides require a cabinet depth of roughly 22 in to 23 in to achieve full extension and proper fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much weight can each slide support?\u003c\/strong\u003e\u003cbr\u003eEach slide supports up to 85 LBS, suitable for heavy cookware, tools, or dense storage.\u003c\/p\u003e","brand":"Knobonly","offers":[{"title":"Default Title","offer_id":48193420263643,"sku":"B0BB25M9RZ","price":173.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/615WwA29EfL._AC_SL1500.jpg?v=1770362526","url":"https:\/\/gearmusthave.com\/products\/knobonly-8-pair-21-in-soft-closing-drawer-slides-heavy-duty","provider":"GearMustHave","version":"1.0","type":"link"}