The ideal chain clamp for the welder or fitter who does not need to reform elbows, tees or other fittings. The Dearman Light series of Chain Clamps are durable and versatile and, like the original Dearman Chain Clamp, reform up to Schedule 20 and align up to Schedule 40 pipe. The jackscrews in the jackbar give the welder the ability to obtain the optimum fit-up of the pipes or fittings to be joined. This light-weight clamp is rapidly adjusted to any pipe diameter by pulling the chain through the main block. Precision outside or inside diameter alignment can be quickly obtained without operator fatigue.