Use wrench on external hex of tool for situations exceeding 150 lb/ft3/8'' square drive on both ends rated to 150 lb/ftFour metric hex sizes 17 mm, 19 mm, 22 mm, and 24 mmFits internal hex on many late model sportbike axles and some dirt bikes.EU: Use wrench on external hex of tool for situations exceeding 203,37 NmEU: 0,95 cm square drive on both ends rated to 203,37 Nm