{"product_id":"21-in-undermount-soft-close-drawer-slides-full-extension-6-pairs","title":"21 in Undermount Soft Close Drawer Slides Full Extension - 6 Pairs","description":"\u003cp\u003eIn this review the 21 in undermount soft close drawer slides are evaluated for home renovators and cabinet makers who need a heavy duty, full extension slide set in bulk. The set includes six pairs and is best known for combining a solid 85LB load capacity with a concealed undermount design and adjustable hardware; that mix makes it a practical choice when replacing multiple drawers at once or building a run of cabinets where quiet, smooth operation matters. Installation notes and the soft close function are discussed below so buyers know what to expect.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength and fit:\u003c\/strong\u003e Each slide measures 21 in (533mm) and fits inside cabinet lengths from 568mm to 588mm, offering a clear sizing range for typical base cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight capacity:\u003c\/strong\u003e Rated to hold up to 85LB, these slides support heavy kitchen or workshop drawers without noticeable sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft close:\u003c\/strong\u003e The soft close mechanism reduces slam and noise when drawers are closed, giving a quieter home environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Full extension slides are made from thickened cold rolled steel with a zinc plated finish for durability and resistance to wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e The package contains 6 pairs of slides, rear mounting brackets, 3D adjustable locking devices, mounting screws and instructions for batch installs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e Designed for drawer boxes using 1\/2 in or 5\/8 in material, so builders should verify drawer thickness before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese slides are a strong fit for DIY renovators, small contractors, or cabinet makers who need multiple matching undermount slides for kitchens, bathrooms, or built-ins. The 6-pair pack and included brackets and screws speed up installations for runs of drawers, while the 85LB capacity handles heavier contents such as cookware or tools.\u003c\/p\u003e\n\u003cp\u003eThey are less suitable for drawers built from 3\/4 in thick material, as the product is not recommended for that thickness. If a project requires integrated full-length heavy-duty slides for very wide or custom-thick drawer boxes, a different slide specified for 3\/4 in material would be a better choice.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull extension and heavy-duty steel construction deliver smooth, durable operation under load.\u003c\/li\u003e\n\u003cli\u003eSoft close feature reduces noise and provides a controlled closing action for a quieter home.\u003c\/li\u003e\n\u003cli\u003eComplete kit with brackets, 3D adjustable locking device and screws simplifies installation for multiple drawers.\u003c\/li\u003e\n\u003cli\u003eGood value when buying six pairs together for whole-room projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot recommended for 3\/4 in drawer box material, so some builders will need to rework drawer thickness or choose different slides.\u003c\/li\u003e\n\u003cli\u003eSome users report mixed experiences with soft close adjustment and initial installation alignment, which can require care to get ideal operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e21 in (533mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInside cabinet length required\u003c\/td\u003e\n\u003ctd\u003e568mm to 588mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad capacity\u003c\/td\u003e\n\u003ctd\u003e85LB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrawer box thickness\u003c\/td\u003e\n\u003ctd\u003e1\/2 in or 5\/8 in (not recommended for 3\/4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish and material\u003c\/td\u003e\n\u003ctd\u003eThickened cold rolled steel, zinc plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage contents\u003c\/td\u003e\n\u003ctd\u003e6 pairs slides, rear brackets, 3D locking device, screws, instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 21 in undermount soft close slides are a practical, cost-effective choice for installers who need multiple concealed slides with a reliable 85LB capacity and a soft close function. They offer strong construction and a full kit for batch installs, making them good value for kitchen or workshop drawer projects so long as drawer thickness matches the 1\/2 in or 5\/8 in requirement.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these slides fit 3\/4 in drawer boxes?\u003c\/strong\u003e\u003cbr\u003eThese slides are not recommended for 3\/4 in material; they are designed to be used with 1\/2 in or 5\/8 in drawer box thickness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they come with all mounting hardware?\u003c\/strong\u003e\u003cbr\u003eYes, the package includes rear mounting brackets, a 3D adjustable locking device, mounting screws and instructions to aid installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow quiet is the soft close?\u003c\/strong\u003e\u003cbr\u003eThe soft close reduces slam and noise for quieter operation, though some users may need to fine tune alignment for the smoothest closing action.\u003c\/p\u003e","brand":"Betesy Hardware","offers":[{"title":"Default Title","offer_id":48618102194395,"sku":"B097PGX7X8","price":109.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/617GImKE33L._AC_SL1500_efdc0f96-557c-4ca0-b76b-ea55cb20cd5d.jpg?v=1778453970","url":"https:\/\/gearmusthave.com\/products\/21-in-undermount-soft-close-drawer-slides-full-extension-6-pairs","provider":"GearMustHave","version":"1.0","type":"link"}