The Aputure a10 Articulating Magic Arm can support heavy accessories without buckling or shifting because it uses a rosette design rather than flat-surface friction. A sizable, cozy lever that is simple to grasp is used to tighten the arm. Ridged grips on either side of each 1/4"-20 nut on the arm ends ensure a snug fit. A CNC aluminum design provides a smooth finish and is robust enough to withstand the demands of shooting. For mounting accessories on top of a DSLR or mirrorless camera, attach the shoe-mount that comes with it to one end. Important Features Aluminum Rosette-Style Clamp, CNC-Made Ergonomic Ridged Grips on 1/4"-20 Screws for Tightening Levers