Wolf Tooth CenterLock Rotor External Splined Lockrings for securing centerlock rotors to centerlock hubs. Machined from 7075-T6 aluminum at Wolf Tooth in Minnesota USA.Compatible with 12mm 15mm and 20mm thru axles and QRMachined 7075-T6 aluminum provides strength with weight savingsDurable anodized finish provides added protection and premium lookTorque to 40NmNot compatible with 6-bolt rotors and hubsWasher included TECH 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 Center Lock Lockring Weight 10.5g Color Ultraviolet Purple Package Each