The AutoLock groove joint pliers have a patented gripping mechanism, allowing them to quickly self-adjust and grip on to thick and thin objects without the need to find a groove. They are twice as fast and 100% easier than traditional groove joint pliers. The specially designed v-shaped jaws allows for a tighter grip on both round and flat objects. They feature the same heavy-duty construction as standard groove joint pliers and maintain the narrow profile required for work in tight and confined spaces. The AUTOLOCK groove joint pliers fully complies with ASME specifications B107.23. Model: 12VJ. Item No.: 41002. Size: 12″ (305mm). Jaw Opening: 2″ (52mm).