The MID49 Universal Speedball Clamp is designed to work with 1" speedball mounting systems often found in accessory arms from Mid49, Wooden Camera, Ultralight Control Systems, as well as others. It features what MID49 refers to as a "Chip Clip" clamp design, which has a spring-loaded T-Bar for tightening or loosening the clamp. The spring-loaded design allows you to position the T-Bar for maximum torque, so you can tighten or loosen the clamp without rotating the T-Bar throughout 360° of rotation. All the components of the clamp are permanently attached, so you won't lose any pieces when it is not in use.