Bessey GM25ZK OMEGA screw clamp GMZ 250/120 2pc Plastic Handle, BE100688 - Clamping force up to 5,000 N. Fixed jaw with patented OMEGA bow for less clamping force loss. Fixed jaw and sliding arm are constructed of tempered steel for resilient clamping. High-quality 2-component plastic handle. Pressure plates can be replaced with no need for tools. Innovative OMEGA bend, The patented OMEGA bend gives you added safety. It means you lose even less clamping pressure, even when vibrations are present.