From irwin vise grips these are the original curved jaw locking pliers their curved jaws provide maximum contact various nuts and bolts ideal for tightening clamping twisting and turning the screw adjustment at the bottom of the vice grip pliers stays adjusted for repetitive use constructed of high grade heat treated alloy steel for maximum toughness and durability and featuring a guarded release trigger that quickly unlocks and protects from accidental release the original and the best