The Suntour QLOC Thru Axle has been designed exclusively to fit mountain bikes with boost axles. Constructed out of Chromoly hardened steel, the QLOC Thru Axle will roll over anything and everything in its way without so much as a blink. If you're after an axle that makes it easy to take your bike anywhere and everywhere, but still hardy enough to be thrashed day in day out, then the Suntour QLOC Thru Axle is perfect for you.