Use pliers to break glass along a score line when the glass cant be handled comfortably by hand. Wider 3/8" jaws are ideal for breaking long strips. A good score will snap cleanly with this plier. Turn the pliers over to use as a grozer (grozing is the "chewing" action that uses the pliers serrated jaw to nibble glass away from an edge). 6" long pliers feature spring loaded jaws. Instructions: Break the glass by holding its surface in one hand and holding the plier in the other hand. Position the edge of the plier parallel to the score line, 1/4" away. Apply a quick up and out motion. To groze or remove unwanted edges from the glass, use the serrated jaw and nibble away glass.