Acratech's Quick-Release Locking Lever Clamp for GV2 or Ultimate Ballhead will fit nearly all quick-release plates that are Arca-Swiss compatible. It has a locking lever and a precision laser-etched scale for accurate positioning. With 3/8"-16 and 1/4"20 mounting thread adapters, it will fit virtually any tripod head. Stainless steel construction and black anodized finish give this clamp a solid feel. A detent pin gives you extra security and the 15mm bullseye level helps to quickly position and level the head.