The irwin vise grip 10r fast release straight jaw locking pliers have heavy duty jaws that allow for maximum contact on all work shapes including round pipes squares or hex bolts they have a self energising lower jaw that allows for three times more gripping power and last twice as long as the high grade alloy steel is heat treated for maximum durability pro touch grips provide more control comfort and less hand fatigue a hex key adjusting screw tightens to draw materials closer together and a