GearWrench 104 Wrench Distributor Clamp GearWrench 104 Wrench Distributor Clamp reaches around obstructions to turn distributor lock. Use GearWrench 104 Wrench Distributor Clamp to join wrenches or attach wrench to a 3/8” ratchet or extension. The GearWrench 104 Wrench Distributor Clamp fits 1/2” and 9/16” lock nuts.