Use wrench on external hex of tool for situations exceeding 150 lb/ft (EU: 203,37 Nm) 3/8" (EU: 0,95 cm) square drive on both ends rated to 150 lb/ft (EU: 203,37 Nm) Fits internal hex on many late model sportbike axles and some dirt bikes Four metric hex sizes; 17 mm, 19 mm, 22 mm, and 24 mm. TOOL HEX AXLE CHROMOLY