Lisle Corp.'s hose clamp vise, No. 44480, is 3-5/8" long and opens to 2-1/8". It can be used to relieve clamp spring pressure in very tight spots. The vise is often left in place, with the clamp compressed, during service. The ramp on the jaws guides the clamp tab into the correct position, and traps it in the slot for safety. Users can tighten the knurled knob by hand or use a 1/4" drive ratchet.