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Knape and Vogt 12 inch drawer slides in the 8850 Series are full extension, soft-close, ball bearing, side mount slides built as 200 lb class hardware for wide drawers with heavy loads. The 12 inch length sets these up for shallow cabinet or furniture drawers where full access to the contents is important. Their full extension action carries the drawer out to the end of the slide, which keeps the back of the drawer usable instead of buried in the cabinet. The side mount configuration uses the cabinet sides as the reference surface, which suits most face frame and frameless cabinet layouts that are already built around side-mount hardware. Ball bearing construction supports smooth motion under load, so drawers still operate predictably when heavily loaded. As a 200 lb class slide recommended for drawers up to 42 inches wide, this model matches applications where both width and weight need support.
These Knape and Vogt side mount ball bearing slides use a slide height of 2.09 inches, which ties into vertical drawer spacing when stacking multiple drawers in a cabinet. The side clearance of 0.765 inch plus 0.03 inch minus 0 inch between the drawer and cabinet determines how the drawer box width is calculated, helping installers hold consistent reveals across a run. Slide width at 0.76 inch gives a predictable footprint along the drawer side, so builders can plan notching or side geometry where needed. Recommended fasteners are #8 x 5/8 inch flathead screw, aligning with common shop screw sizes and allowing flush mounting in standard countersinks. The unhanded configuration allows either slide to mount on either side, which keeps installation straightforward when working quickly or in tight spaces.
These Knape and Vogt 8850 Series 12 inch full extension slides are described as ideal for wide drawers with heavy loads, so they align well with storage bases, shop cabinets, and utility drawers where tools or hardware add weight. Being recommended for drawers up to 42 inches wide, they support long drawer fronts without compromising motion when properly installed. The 200 lb class rating allows designers to consolidate storage into fewer, wider drawers rather than multiple narrow sections while still staying within the slide capability. The 12 inch nominal length fits shorter cabinet depths, making these slides suitable for compact furniture pieces or upper cabinets that still need full access. Their side mount, ball bearing layout works with typical cabinet construction methods, so they slot into projects that already assume side-mounted hardware.
The best-in-class soft-close module with patented Force Management Technology reduces opening pull force while maintaining effective dampening, which helps drawers start easily yet settle gently against the cabinet front. That consistent closing action protects front alignment over time because drawers do not strike the face hard at the end of travel. The full extension travel keeps the drawer fully supported even at maximum reach, which reduces racking and stress on the box when users pull hard on wide fronts. A defined side clearance of 0.765 inch plus 0.03 inch minus 0 inch removes guesswork when sizing drawer width, improving repeatability across production runs. The lever release function lets installers remove the drawer box during finishing or service without disturbing cabinet mounting, which keeps alignment references in place. With slide height at 2.09 inches and slide width at 0.76 inch, layout planning can be standardized in shop jigs so multiple cabinets share the same hardware geometry.
The 8850FMB 12 is a Knape and Vogt 8850 Series full extension, soft-close, ball bearing, side mount drawer slide, so it supports smooth travel and controlled closing in side-mounted drawer applications.
This model is a 200 lb class drawer slide, which means it is built for drawers carrying heavy loads in wide base cabinets or storage units when installed within its rated application.
The slide is recommended for drawers up to 42 inches wide, giving a clear upper width guideline when designing wide drawers or planning replacement of existing hardware.
These slides specify side clearance of 0.765 inch plus 0.03 inch minus 0 inch, which defines the space between drawer and cabinet for proper fit and smooth operation.
The patented Force Management Technology delivers low opening pull force while ensuring dampened closure, so drawers start easily yet close without slamming against the cabinet front.
The manufacturer recommends #8 x 5/8 inch flathead screw fasteners, which sit flush in countersunk holes and match common cabinet hardware practices for secure side mounting.
The Knape and Vogt 12 inch drawer slides 8850FMB 12 pair a 200 lb class rating with full extension and soft-close action, so they serve heavy, wide drawers in a compact depth. Defined side clearance, slide height, and slide width let builders design drawer boxes around known geometry instead of guesswork. A non-handed, lever release layout keeps installation and future service straightforward in both new builds and upgrades. For projects needing side mount soft-close performance in a 12 inch length, these 8850 Series slides from Wurth Baer Supply align the specifications with real shop needs.
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