Irwin’s Vise-Grip Curved Jaw Locking Pliers have a lower jaw that delivers three times more gripping power without slipping or stripping. The Fast Release model has a one-handed, triggerless release and anti-pinch non-slip grips. The Original model has a classic trigger release. The pliers establish multiple contact points with a work piece for a tighter grip. Both models are constructed of a high-grade heat-treated alloy steel.