Grip-On 122-10G 10-Inch Convex Jaws Locking Pliers with Pipe-Holding Groove, Nickel-Plated Longitudinal v-groove section holds round objects securely, with three points of contact preventing lateral movement while working Tapered groove widens in a V-shape, securing small objects at the front of the jaws and larger diameters up to 1-Inch in the rear of the jaws Convexed tooth section of the mobile jaw pushes flat work pieces against the large flat fixed jaw for tighter clamping Recessed area of the mobile jaw allows angled objects to be held and small obstacles to be cleared Serrated milled teeth provides positive grip on different shaped objects