The Pro. Master XC-MH36 is a well-featured technical ball head with incredible strength in a compact and lightweight form factor. It is made of high-grade machined (not cast) aluminum. The XC-MH36's dual-action design uses separate knobs to adjust ball tension and panning control. An etched, numbered scale at the head's base facilitates precise panning movements. The tension control knob has an integrated memory lock dial which allows you to set a repeatable tension stop. Its quick-release system uses a Dovetail plate (Arca-type) with safety bolts. All knobs are covered in a soft, grippy material that is comfortable and easy on your fingers, even in cold weather. Multiple integrated bubble levels (one bullseye and two line levels) let you precisely level your camera in either horizontal or vertical positions. The included quick-release plate has a strap slot that is compatible with a variety of straps and handgrips.