KV 8157P EB 18, 18in 75inlb Side Mount ball Bearing 3/4 Ext Drawer Slide, Black, Polybag, Knape and Vogt

Knape & Vogt 8157 Keyboard Slide in Black, Built for Darker Desk Workstations

This is an 18 inch, 3/4-extension ball-bearing keyboard slide from KV's 8157 series, finished in Ebony Black for workstations and home-office desks where dark cabinetry or charcoal laminate surfaces call for hardware that disappears under the worktop rather than reflecting in plain silver.

Key Features

• Ebony Black steel finish — low-visibility hardware that blends under dark or black-finished desks instead of contrasting against them.
• Seven-position height-adjustable brackets — dial the tray's drop height between 2.34 and 3.68 inches to put the keyboard exactly where the user's wrists want it.
• Hold-out detent — keeps the tray extended and steady at full open so it does not drift back during use.
• Hold-in detent — holds the tray closed at rest without a latch, preventing it from rolling out from vibration or a bumped desk.
• Shelf tabs on the 8157 — the tabs bear directly against the tray panel, giving the platform a solid, rattle-free seat on the slides.
• 75 lb class ball-bearing movement — smooth, full-travel action well beyond typical keyboard tray loads.

Where These Slides Earn Their Keep

The 18 inch length suits deeper worksurfaces — think a 30 inch standing desk with a wide rear service run, a built-in home-office unit with a pull-out typing shelf, or a commercial workstation where an ergonomic keyboard drop is specified at build time. The 3/4-extension geometry is the standard for keyboard applications: the tray slides out to a comfortable reach, and the bracket assembly manages the mechanics cleanly under the deck. At 18 inches, there is enough bearing travel to place a full-size keyboard and numpad on the tray without the platform feeling like it is straining at the end of its run.

Material and Finish Details

The slides are steel with an Ebony Black finish that reads matte-dark under the worksurface rather than flashing bright in an open-office environment. For installations where under-desk visibility matters — glass-top desks, open-frame workstations, or any setup where the user sits close and looks up — the black finish is a deliberate specification choice, not just a color option. The 8157 series is also available in Anochrome if a silver finish better matches the build; the specs are otherwise identical.

Who Orders These and Why

Cabinet shops building dark-stained or black-painted office units reach for these when the client wants a cohesive look through to the hardware details. Interior designers specifying ergonomic workstations use the seven-height bracket range to match a fixed typing posture to a fixed desk height. Facilities teams outfitting computer workstations in call centers or trading floors favor the hold-out detent because operators need both hands free the moment the tray is pulled out. The poly-pack ships as a pair with screws, so one bag completes one keyboard tray installation. Maximum recommended tray width is 24 inches.

Black Hardware, Steady Platform, Done

The 8157 in Ebony Black brings height-adjustable, detent-held keyboard tray action to dark desk builds where silver slides would stand out for the wrong reason — giving ergonomic function and a clean finish to the workstation at the same time.