Three axis tripod head. Uses standard quick release plate. Supports up to 22 lbs. Requires 3/8" tripod screw. (Attached link says 1/4", I believe thats for a newer version.) For full description, see https://www.bhphotovideo.com/c/replacement_for/434497-REG/Manfrotto_804RC2_804RC2_3_Way_Pan_Tilt_Head.html