The Tripod Rig is part of the modular extreme rig system. ---It is the main bars module with a camera plate and camera 1/4"-20 screw and a tripod plate with 1/4"-20 and 3/8-16 threads that can be mounted to any tripod head-- Bars extensions are screw in type --Additional Bars can be added in front or back of the main block. Bars height is adjustable from 10mm to 25mm between camera bottom to center of bars.