High quality material: Build your own individual pull-out keyboard tray. Our keyboard slides are built from a sturdy cold-rolled steel frame with a corrosion-resistant coating, they run quietly and smoothly, and are more stable, durable, and longer lasting than ordinary keyboard slides. Features: Ball bearing drawer slides with integrated dual-row ball bearings for easy, quiet gliding. The pad on the front of the guides cushions shocks when inserting and removing. Height adjustable: Equipped with a longer and thicker glide rail for stability and to prevent wobble. Five adjustable holes allow you to set the height for ergonomic alignment. Mounting options and applications: Side mounting. Ideal for mounting under-desk keyboard trays and drawers in homes, cabinets and furniture, kitchens, offices and garages. Use scenarios: - Home office: install under the desk to free up workspace while keeping the keyboard within reach. - Kitchen or cabinet: side-mounted under-counter solution for a compact keyboard area. - Workshop or garage: attach under a workbench or cabinet to keep a keyboard accessible but out of the way.