The? Leofoto MK-40X Rifle Ball Head With Lever-Release Arca Clamp? was designed specifically to be used on an SA-X tripod, but it? features both the SA-X rosette connection as well as a standard 3/8" mounting socket. The head features an elongated knob for easy locking and unlocking of the ball, accompanied by a smaller tension control knob. The elongated knob is the perfect length to be used with a rifle clamping mount to not interfere with the large mount. The clamp is Arca compatible. Leofoto MK-40X 40mm Rifle Ball Head w/Rosette, 3/8" Mounting Socket & Elongated Control Knob MK-40X in Black