Irwin Industrial Tools 77T 2-Piece Fast Release Set Contains: 10WR and 6LN. Fast Release is 2x easier to open, has a no-trigger release, and offers one hand operation. The no-slip ProTouch grip provides comfort and leverage while reducing vibrations and hand fatigue. Ideal for tightening, clamping, twisting and turning. Turn screw to adjust pressure and fit work. Stays adjusted for repetitive use. Hardened teeth are designed to grip from any angle.