describe Size: 6.9 cm Utility Tool: This hex axle tool is designed for mounting sport and off-road vehicles with hex axle holes. It is used for installing, removing, or other modifications/adjustments of the front axle. It is an essential tool for removing motorcycle front tires. Function: This tool is designed for sport off-road vehicles with hexagonal axle holes for installing, removing, or other adjustments to the front axle, ensuring that the fork is properly aligned with the axle and preventing the fork from sticking. High Quality: Made of heavy-duty chrome-molybdenum steel, this motorcycle tailstock is durable and still performs well in high-torque applications. Specifications: There are four metric hex sizes: 17mm, 19mm, 22mm, and 24mm.