The Jorgensen ISD 18 inch one handed bar clamp delivers 10-40 more clamping force than any other one handed bar clamp on the market. The ISD clamps have dual durometer handle for a soft comfortable grip. The ISD clamp can also be used as a spreader clamp. Dual Durometer handle design for comfort. New and improved one handed clamp delivers 300 lbs of sustained clamping force, an I-Beam bar, and locking swivel jaw. 3-1/2 inch throat depth. Removable pads; Quick Change screw.