IRWIN Tools VISE-GRIP Locking Pliers Set, Original, 2-Piece in Tray (4935580) Ideal for tightening, clamping, twisting and turning. Classic trigger release provides maximum locking force. Constructed of high-grade heat-treated alloy steel for maximum toughness and durability. Adjust pressure and work fit with turn screw that stays adjusted for repetitive use. 3-Piece Set in tray includes 10CR, 7CR and 5CR.