The Wolf Tooth Wolf Axle For 12mm Rear Thru-axle Is Lightweight, Durable And Available In A Variety Of Vivid Colours. If You\'re Replacing A Worn Stock Axle Or Are Looking For A Coloured Upgrade This Is A Sound Investment.In Choosing To Use A Captive Steel Washer Under The Axle Head, Wolf Tooth Has Found A Way To Protect Your Axle Head But More Crucially, Your Frame. The Steel Washer Rotates Within The Axle But Stays Secured To The Head, Meaning That Creaks And Squeaks Are A Thing Of The Past As The Steel Washer Provides Intermediary Contact Between Frame And Axle.If You Value Frame Longevity And Want To Add An Extra Flair To Your Ride, Then The Wolf Axle Is Ideal.Key Features:Fits Frames With A 12mm Rear Thru-axle,Handcrafted By Wolf Tooth In Minneapolis, USA,Machined From 7075-t6 Aluminium,Easily Adjusted With A 6mm Hex Key.