This is an Ideal clamp for many photographic applications. Utilizing an ergonomic lever to securely lock clamping position, it clamps easily and securely. This replaces the Manfrotto 2915. Attachment (bottom): 16mm hexagonal + M5 & 1/4" threads; clamp range - max. (round tube): 2.17 in.; clamp range - min (round tube): 0.51 in.; color: black; load capacity: 33.07 lbs.; material: aluminum; weight: 0.90 lbs.