wolfcraft 3447403 Quick-Jaw One-Hand Bar Clamp and Spreader, 6" Comfortable 6-inch bar clamp that helps deliver a true one-handed operation experience 3-1/2-inch full depth clamp pads with V-groove provides a maximum clamping area Added force amplification increases the pressing force, and ergonomic handle delivers comfort Quick-release button provides easy conversion to the additional spreader 5-year limited manufacturer's warranty