The large Keyboard Tray accommodates a keyboard and mouse (mousepad included). It tilts over 200 degrees and locks in place. There is a 1.375" lip at the back and a 0.875" lip on the sides to prevent the keyboard and mouse from slipping and includes cut-outs for cable management. A fabric covered foam palm support of 27.0" W x 0.875" H x 3.0" D is included. The articulating arm suspends the keyboard while still allowing it to be repositioned easily.