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 the manufacturer&';s exact specifications. Fits: Jeffsey MK3 SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Model YT 172.5 Description 12x172.5mm Rear Axle Axle Length (mm) 172.5 Thread Pitch - Color Kash Bronze