Keyboard trays and drawers put the typing surface at the right height instead of wherever the desk happens to be: under-desk trays that slide out and adjust for keyboard and mouse, articulating arms that add tilt and height range, and rack-mount keyboard drawers that give server cabinets a working console that disappears when closed. They recover desk space and posture at the same time.
For desks, the mounting track is the constraint - measure the clear depth and width under the work surface before ordering, and check that the tray's mouse platform sits on the side the person actually uses. Adjustability earns its cost wherever a position is shared. For racks, a keyboard drawer is specified by rack units and depth like any other rack device, and pairs naturally with a rack-mount display or KVM. COLAMCO quotes keyboard trays and drawers for office and equipment-room fits across business, government, and education workplaces.