Mini Bipod System, tribrach alternative, tripod alternative, backsight alternative. 5/8-11" thread for prism or mini prism. Includes mini pole, mini bipod, leveling screws x2, locking nuts x2, and locking knob. Does not include prism/mini prism. Prism/mini prism for illustrative purpose only. Compatible with optional stud adaptor for Leica/Swiss-style prisms