Bessey GearKlamp® Bar Clamp GK Series 18" GK45The first of its kind provides a unique clamping solution for difficult set ups in tight spaces. Quick shift button on the arm for broad movements of the operating jaw. Once the operating jaw is in position the around the rail handle is twisted clockwise to tighten the clamp. To loosen the clamp, twist the clamp handle counterclockwise. Clamping force up to 450 lbs. Clamping capacity: 18" Throat depth: 2 3 8" Weight approx. 1. 60 lbs. Made in China