Malleable cast jaw clamp Features a serrated rail with robust cast iron jaws BESSEY anti-slip system - the set screw is molded into the sliding arm and interlocks with the serrated rail to prevent sliding Corrugated malleable cast iron fixed jaw and sliding arm generate powerful, rigid clamping High-quality profiled steel rail acts as a reliable reinforcement against torsional forces, while the serration on six faces additionally prevents the clamp from slipping Hardened, smooth-running spindle with ACME thread = more clamping with less cranking Comfortable 2K composite handle