The CNW-2 makes chainring bolt and nut installation and removal easy. It securely holds the unique slotted chainring nuts in place to prevent slipping while tightening or loosening the bolt. Double-ended to fit most slotted-type nuts. The outer width of both ends of the CNW-2 are nominally 12 mm wide One end has a two outer tips nominally 2.7 mm wide each and the other end has tips of 3.8 mm each The blade thickness is nominally 1.35 mm TECH SPECS Model Chainring Nut Wrench CNW 2 Description Chainring Nut Wrench Color Silver 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 ul{font-size:24px;font-weight:600;margin-left:-25px;padding-top:35px;border-top:3px solid #f0f0f0;}.desc li{list-style:none;border-bottom:4px solid #eb212e;width:142px;}