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This is a 20 inch side-mount ball bearing file drawer slide from Knape and Vogt's 8505 series, rated 150 lb per pair, with 1 inch of over-travel that carries the drawer past full extension and a hold-in anti-rebound detent that keeps it closed once pushed shut.
Standard full-extension slides bring the drawer to the cabinet face. The 8505 goes a step further: the drawer member extends 1 inch past the slide's 20 inch length, so the rear of the drawer clears a countertop overhang or a deep face frame entirely. That extra inch matters in a lateral file drawer mounted under a worktop — the rearmost hanging folders come fully into reach instead of sitting just out of sight. It is equally useful under a deep laminate countertop in a kitchen island or workbench setup where the cabinet face sits back from the leading edge of the surface above it.
The slide is formed from steel and finished in zinc, the standard corrosion protection for side-mount ball bearing slides in dry indoor environments. The zinc finish is a functional surface, not a decorative one — it is largely hidden beside the drawer box once installed. The progressive ball bearing movement runs in full-length steel raceways and is sized for the load class: at 150 lb per pair, the 8505 series is in a different duty tier than standard 100 lb cabinet slides. The hold-in anti-rebound detent is a mechanical feature, not a damper; it holds the drawer closed without spring assist and without slowing the close.
Choose the 8505 when the drawer carries files, archived paper, or other dense storage contents, and when it sits under a surface that would otherwise limit rear access at full open. KV recommends this series for drawer widths up to 30 inches — narrower than the full-extension 8500's 36 inch limit, a useful spec check before cutting the box. The 1/2 inch side clearance per side is standard for this series, so the drawer box is built 1 inch narrower than the cabinet opening. In face-frame cabinets, rear mounting brackets are required to support the back of the slide; those brackets are sold separately and are specific to this series.
Over-travel. The drawer member travels 1 inch beyond the 20 inch slide length, so the drawer opens past full extension. This is different from a plain full-extension slide, which stops at the cabinet face.
Neither. The hold-in anti-rebound detent is a mechanical catch that keeps the drawer closed once it is pushed shut and prevents it from bouncing back open. There is no damper and no spring — the drawer does not pull itself shut, it simply stays where you put it.
Knape and Vogt recommends a maximum drawer width of 30 inches for the 8505 series. This is narrower than the full-extension 8500, so confirm the box width before cutting.
No. The 8505 is non-handed — the same slide fits either side of the drawer, and both slides in a pair are identical parts.
Yes, but you will need rear mounting brackets to support the back of the slide. Those brackets are not included and are specific to this series — order them separately before installation.
When the drawer sits under a worktop and carries a real load, the 8505 series delivers the extra travel and the detent discipline to make it work — rear contents reachable, drawer closed firmly, day after day.
Sold In: 5 Set
