Self-centering vise 91X51mm on Erowa ITS plate. RHS mini self-centering vise is 55mm clamping mounts directly on System 3R parts. Special holder to clamping small weight workpiece. Use a regular handle to threading the side screw to lock the workpiece and centering on the holder. Comes premounted on Erowa equivalent plate.SPECIFICATIONS Size 91x51x63.2mm Repeatability within 0.005 Material High grade steel 48-52HRC Locking Force 3000N Max Clamping 55mm Torque 25NM Weight 2kg