Simple, elegant and easy to use with your 3/8 drive socket wrench. Covers most late model street bikes. Machined from super-tough Cro-Moly steel for strength and long lasting durability. Every toolbox should have one!; Use with a 3/8 square socket drive wrench Fits axle sizes: 17mm, 19mm, 22mm, 24mm High-strength Cro-Moly steel for years of hard use