The Spider Crab Quick Release Adapter from iFootage features a twin-thread, ARRI-style 3/8"-16 pin quick release system that ensures your valuable kit is always safe and secure. The quick release head automatically locks in place when inserted into the housing, and a secondary lock is provided via the buckle lock system. A 1/4"-20 stud can be accessed by pressing down on the 3/8"-16 thread.