- Clean and simple is always best. Leverless design for added security and clearance for when situations get tight - These super tough axles tighten up with a 6mm allen key. They feature 'a get out of jail’ 6mm allen key on the drive side of the axle if you manage to round the non drive side - Constructed from 7075 aluminum and made to manufacturer's exact specifications - Length is 170mm, thread M12x1.5mm pitch 10mm long (fits Shimano Boost E-Thru) - Fits all 148x12mm Yeti frames and other Shimano E-Thru Boost frames