Tighten knurled knob by hand or with a 1/4" drive ratchet
Not recommended for 3/8" steel
Tool is used to relieve clamp spring pressure in very tight spots. Vise can be left on, with the clamp compressed, during service. Ramp on jaws guides tab of clamp into correct position and traps it in the slot for safety. Tighten knurled knob by hand or with a 1/4" drive ratchet.