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The Knape & Vogt 8908 series is a 12 inch full-extension side-mount ball bearing drawer slide rated at 500 lb per pair, with a combined hold-in/hold-out detent that locks the drawer in both the closed and fully open positions. It is built for heavy-duty shop, industrial, and commercial installations where standard cabinet-class slides are simply undersized for the job.
A 500 lb per pair rating puts the 8908 series in a completely different duty class than the 75–100 lb slides that serve kitchen and office work. It belongs in tool chests and machinist cabinets loaded with iron, shop benches with heavy stone or steel surfaces that pull out, industrial storage units, and commercial service carts where drawers take real abuse every shift. The hold-in detent keeps the loaded drawer from bouncing back open after a firm close — a practical detail when the contents are heavy enough to create real rebound force. The hold-out detent keeps the drawer at full extension while both hands are occupied at the bench, releasing with a normal inward push when the work is done.
Cold-formed steel members run on full-length ball bearing raceways sized for the load class. The zinc finish provides the corrosion resistance expected of indoor industrial hardware — it is a functional, hard-wearing coating, not a decorative one. Zinc is the right choice when the slide is going into a paint booth, a shop cabinet, or a utility unit where appearance is secondary to service life. For food-service wet environments or outdoor exposure, a stainless finish variant is the better call; zinc is an indoor finish.
Cabinet shops building custom tool storage, millwork studios outfitting heavy-duty workbenches, and facilities managers sourcing replacements for industrial service carts all land on this slide for the same reason: the 500 lb rating and the dual-position detent solve two problems at once. The 3/4 inch side clearance per side is wider than the standard 1/2 inch found on cabinet-class slides, so verify your drawer box width and cabinet opening before building. In face-frame cabinets, rear mounting brackets are required to support the back end of the slide and are sold separately. The non-handed, 12 inch format is a straightforward shop-bench depth that suits tool storage drawers and pull-out work surfaces sized for compact units.
Hold-in is a detent that keeps the drawer closed and prevents it from bouncing back open when shut firmly. Hold-out is a separate detent that keeps the drawer fully open until you intentionally push it closed. This slide has both. Neither detent is a lock — both release with a deliberate pull or push.
Per pair — one pair of slides carries up to 500 lb. Do not double the number by counting each slide separately.
Yes. With 3/4 inch of clearance required on each side, subtract 1-1/2 inches total from the cabinet opening width when sizing the drawer box. This is wider than the 1/2 inch clearance on standard cabinet slides, so check your dimensions before cutting.
No. The 8908 series uses a hold-in detent to keep the drawer closed — not a damper. There is no soft-close or self-close on this slide. The drawer stays where you leave it and must be pushed or pulled deliberately.
No. The 8908 series is non-handed, so the same slide works on either side. Order the number of pairs your project requires without specifying handedness.
When the job calls for a slide that holds its position under load, survives a busy shop environment, and never needs a left/right sort at the bench, the zinc-finished 8908 series in 12 inch is the straightforward answer — rated for the weight, built for the detent, and packaged for volume work.
Sold In: 1 Each
