Impact-resistant plastic and steel drawer holds standard and ergonomic keyboards. Patented clamp system attaches unit to virtually any worksurface (5/8" to 1-5/8" thick) without tools. Tray adjusts to three height positions below worksurface (2-1/2", 3-1/8" or 3-3/4") for user comfort. Tilts 3, 6 or 9 degrees. Soothing memory foam wrist rest. Separate mouse platform positions right or left. Smooth ball bearing glide tracks. Convenient cable management.