Fits internal hex axles on many late model sportbikes and some off-road bikesFour metric hex sizes: 17, 19, 22 and 24mmMade from billet 7075-T6 aluminumWeighs only 2.5 oz.Ideal for touring and trail side use 3/8" square drive on both ends rated to 90 lb/ftUse wrench on external hex of tool for situations exceeding 90 lb/ftUse 678397 CrMo steel version for shop use