Compatibility: -7110-1200 Standard Clevis with 3/8 mounting hole -7160-1160 6in Locking Slide Arm with Short Clevis -7160-0436 Angled Low Swivel with 3/8 mounting hole -7160-0757 Quick Release Keyboard Tray -KEYBOARD-BRKT keyboard bracket This keyboard arm allows you to extend or retract your keyboard to any desired position. Placement : Attaches to any Gamber-Johnson motion attachment with a 3/8 hole or item no. KEYBOARD-BRKT Features: -Keyboard arm extends 10" (25.4 cm), positioning the keyboard closer to the user; or stowed away when not in use. -Attach Gamber-Johnson Clevis and keyboard tray to one end of the keyboard arm. -Attach one end of the arm to the KEYBOARD-BRKT to pole mount the keyboard arm.