Features and Benefits: Straight jaws provide maximum contact on flat square or hex work Ideal for tightening clamping twisting and turning Turn screw to adjust pressure and fit work; stays adjusted for repetitive use Constructed of high-grade heat treated alloy steel for maximum toughness and durability Guarded release trigger quickly unlocks and protects from accidental release Hardened teeth are designed to grip from any angle. Jaw capacity: 1-3/4