The MH621 Quick Release Connect Adapter can be equipped with a camera plate that slides forward and back for macro positioning, and features a safety button that limits the amount of sliding on the quick release. Quick release plates are fitted into a compatible tripod's pan head or ball head quick release mechanism for easy removal and replacement of equipment. The MH621 has two bubble levels. Two threaded holes on the side of the quick release allow for storing the unused camera screw directly on the assembly. Dual bubble levels safety catch. 3/8" Mounting screw for attachment to ball heads 1/4-20 and 3/8" threaded holes for mounting.