An increasing number of motorcycle axles have an inverted hex ("socket head") on one side, which must be held in place to loosen the axle nut. Since hex wrenches of this size are not easily available, CruzTOOLS developed the Axle Hex Adapter. Measuring only one inch (25 mm) long, one simply needs to use a standard socket or adjustable wrench in conjunction with the axle hex adapter. The adapter is forged using heat-treated carbon steel with a gold anodized finish. 19 mm x 22 mm or 14 mm x 16 mm hex size. Separated by an "E" clip. Forged using heat-treated carbon steel with a gold anodized finish. Lifetime Guarantee - no questions asked!