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 Set includes: 10R, 10WR, 7R, 7WR, 7LW, 5WR, 6LN, 9LN, 6R and 11R. Packaged in a tray,