586-757KB Features: -Ideal for tightening, clamping, twisting and turning.-Turn screw to adjust pressure and fit work. Stays adjusted for repetitive use.-Guarded release trigger quickly unlocks and protects from accidental release.-Hardened teeth are designed to grip from any angle.-Material: Alloy Steel.-Testing and approvals:.-GGG-W-00649. Construction: -Constructed of high-grade heat-treated alloy steel for maximum toughness and durability.