This is a "must have" item for a pro shop or high volume regripper! The Golf Mechanix Speed Clamp’s unique clamping fixture instantly self-adjusts to any shaft diameter size, without the need to manually adjust a dial to the proper size. Once the clamp comes in contact with the golf shaft, the gears lock into place creating a slip proof hold on any size shaft using very light clamping pressure to safely hold even the lightest of graphite golf shaft designs.