Mo-Clamp 0405 Dyna-Mo W Clamp (3-Tons Capacity). New generation of Mo-Clamps. Self-tightening. Wider tooth surface to grab more thin metal without tearing. Drop-forged round wedge to keep twist out of chain and agressive cross-hatch tooth design. Specifications: Gripping surface - 2-1/4" wide x 1-3/4" deep, Overall length - 7", Capacity - 3-tons.