USAG/Facom 54A Series Heavy Duty Offset Ring Wrench-27mm (54A.27) - heavy duty offset ring wrenches available in sizes 24mm to 100mm . High torque/leverage from 4 different length handles (ordered separately). This size wrench requires a 54.M1B drive handle. The Facom and USAG wrenches are identical...USAG is cheaper and has a US warranty.