AUTO-STOP JAWS SLIDES: Inhibits the widening of the chuck jaws beyond their optimum clamping range ensuring the material is properly secured. LONG-LASTING: Enhanced jaw gearing provides extra smooth jaw movement and increased clamping pressure for maximum material support. ENHANCED JAW GEAR: Povides extra smooth jaw movement and increased clamping pressure for maximum material support. SPECS: 1 in. x 8 TPI Mount; Standard 2 in. Jaws VISIT OUR BRAND STORE: Explore a wide range of tools and hardware that will suit your everyday needs. From bandsaws boards to table saws, our brand store offers all.