Product Description
The height adjustable Fellowes Office Suites Underdesk Keyboard Drawer converts a conventional desk to an ergonomic workstation! Moves keyboard and mouse off the desktop to save workspace. Unit is easy to install and offers three different height adjustments to suit preferred work position.  Mouse tray mounts on right or left side of keyboard tray or stows underneath keyboard tray when not in use. The depth of the unit itself from tip of the keyboard to the end of the glide track (front to back) is 16”. The tip of the keyboard drawer is designed to protrude from the desk so the part underneath the desk (front to back) is 14-1/4”.
From the Manufacturer

Reduce desktop clutter with the Fellowes Office Suites Underdesk Keyboard Drawer. Constructed from 100 percent recycled materials, this sturdy, impact-resistant drawer lets you move your keyboard and mouse off your desk to give you plenty of room to work. Easy to install, the drawer can be adjusted to three different heights and fits standard keyboards.