Salsa Deadbolt Ultralight Thru-Axle Lightweight and Durable If you're looking for a lightweight thru-axle for your Salsa, then you're in the right place. The Salsa Deadbolt Ultralight Thru-Axle is offered in a 6mm flat button head design, for a flush, clean look. It is made from CNC-machined 7000-series aluminum and is designed to fit all current Salsa thru-axle frames. Features CNC-machined from 7000-series aluminum Designed to fit all current Salsa thru-axle frames6mm hex wrench required for installation | Salsa | Deadbolt Ultralight Thru-Axle 15X135Mm, 1. 5 Thread Pitch, 12Mm Thread Length