TheWolf Tooth Axle for 12mm Rear Thru Axledoes more than just secure wheels. Developed by Wolf Tooth,the engineers knew that they wouldn’t be able to get away with any old factory replacement part, even if it was made in Minnesota to aerospace standards.TheWolf Tooth Axle for 12mm Rear Thru Axleuses a captive steel washer under the head to reduce friction on the dropout face. This protects your expensive frame, transfers more of the tightening torque to clamping load for a stiffer interface, and prevents the axle from sticking or galling when you want to remove it. Wolf Tooth Axle for 12mm Rear Thru Axle Features These are also a great replacement option for lost or damaged stock axles ... More info