Tekton deep bite round jaw pliers are designed to encircle pipes, round fittings, and hex nuts, and dig in with sharp teeth set at opposing angles. As the pliers close, the bottom jaw shifts forward, setting the teeth into a strong directional bite, creating even higher clamping pressure. Easily set, release, and reposition the clamp with one hand and with more control than a traditional pinch-style lever. Get extra leverage and fine-tune your clamping force by inserting a screwdriver or hex key into the through-hole to create a T-handle. The jaws are made from 4140 chromium molybdenum steel, an alloy that offers toughness, machinability, and corrosion resistance. The teeth are hardened to 45-50 HRC and should not chip or strip even on fasteners up to Grade 8 or Class 12.9. The pliers have a durable, nickel-plated finish that protects against corrosion.