Nine times faster than a C clamp, Bessey's Medium Duty Tradesmen Bar Clamp is simply unequalled. The choice of professionals worldwide, this fast action sliding arm bar clamp features a profiled rail and I-beam design that minimizes flexing and bending common with flat bar rails. A patented non-slip locking device and zinc-finished, drawn rail prevent marring and staining of the work piece. The ergonomically designed 2K Comfort Grip Handle gives you positive strong clamping power. Galvanized metals eliminate stains and rust. Bessey's cold drawn profiled steel rail offers total control over the work piece. The built to last clamp is corrugated for extra strength, and powder coated for protection against corrosion. A uniquely designed setscrew is permanently molded into the sliding arm, and interlocks with serration on six sides of the rail provide the ultimate non-slip grip.