CRL 8" Lightweight Glass Running and Nipping Pliers are constructed from a very strong and durable plastic that will last faithfully over the years. They feature snap-in replaceable jaws, one set for running and one for nipping. Maximum glass thickness for this pliers is 1/4". This glass pliers is well balanced to fit in your hand without causing excess fatigue. Safety tip! When working with glass, always wear the proper safety gear. Failure to do so can result in injury.