DIY Customized Design: Save desk space by transforming your very own keyboard tray (at least 10.5” in width, 0.6” in thickness, and up to 11 lbs in weight) into an under desk sliding tray with this durable set of clamp-on rails Height Adjustable for Ergonomic Typing: Easily slide your tray in and out from your desk and enjoy ergonomic typing angles to relieve stress. The mounting brackets are height adjustable for customized placement (2.4” of total adjustment with 5 set points) Sturdy C-Clamps: The C-clamps hold everything tightly in place and adjust with simple hand tightening. Please Note: Before purchasing, ensure that your desk surface does not exceed a thickness of 1.75” Scratch Safe Design: Anti-skid padding ensures your keyboard tray remains securely attached to your workstation without causing any damage to your desk Easy Installation: Simple instructions are provided to assemble your slider tracks and attach your keyboard tray to the brackets. Package includes 2 slider tracks, 2 C-clamps with padding, and all mounting hardware