Automatic adjustment to workpieces of various thicknesses Sturdy jaws and base plate made from high-quality cast iron The copper-plated spindle prevents welding splatter from sticking Precise 90-angles Automatic adjustment, The spindle nut with articulated bearing allows automatic adjustment of the pressure jaws for different workpiece resistances. Open working area, The open passage makes it possible to fix T-fasteners and ensures free access to the workpiece for welding and assembly work. Stable base and clamping jaws, The stable base and the clamping jaws are manufactured from high-quality cast iron for high clamping power. They are zinc-coated and thus protected against corrosion. The jaws are processed for precise right-angled clamping. Copper-plated spindle, The spindle with acme thread is copper-plated to prevent the adhesion of welding spatter.