Crank handle anchored to base. For pipe support from 1/8"-6" (3mm-150mm), suitable in many applications,like pipe threading, cutting, grooving etc. Toothed jaws are for pipe clamping securely. Die casting aluminum solid base, light-weight, durable and impact resistant. Built-in tool tray, tool hanging slot, pipe rest and bender. Foldable structure, easy for transportation and stock.