HAVIS's C-KBM-202 rugged keyboard mount and adapter combination. This mount allows for quick, reliable, and secure mounting and unmounting of third party keyboards. It has a front-access trigger that permits easy fore/aft adjustment within a range of 3.875 in. You can easily remove the keyboard using the unique quick release button. It accepts VESA 75 hole pattern (75 mm x 75 mm), as well as AMPS pattern (30 mm x 38 mm) and works with newer TG3 bltx/bltxr keyboards.