QTY 1 2-Post Rackmount Keyboard Tray Assembly QTY 10 10-32 Cross Head Screws QTY 2 Extension L Brackets QTY 10 10-32 Cross Head Screws Screw Driver *Only for 4-Post Rackmount Keyboard Tray and Extension Kit* a) Pull the keyboard forward to provide more room in the back of the tray. b) Using the included 10-32 Cross Head Screws, secure the Extension L Bracket to the rear of the keyboard tray as shown. c) Repeat on the other side.