The AC-CSLXLSK2 clamp is the same as the AC-CSLXL but designed with double cutouts to be more adaptable. Works well with lights, monitors and other accessories. It has 200 degrees of side to side movement and measures 5" between the centers of both ball mounting holes. Uses a 1/4"-20 coarse thread bolt, works with any 1" ball and comes with a selected color knob. Made out of 6061 T6 aircraft-grade aluminum with Type III anodizing . Will work in the harshest of environments, time proven and built to last.