Description: 1000+ cuts: Extreme Diamond Edge is made with metal cutting diamonds bonded to the wheel’s surface using a proprietary technology. Increased safety: Extreme Diamond Edge is made from solid steel that greatly reduces the risk of breakage. No shelf life: Unlike bonded abrasives, Extreme Diamond Edge will not expire, as long as it is stored in proper conditions. Product Width [Metric]: 22.23 mm. Bore Size [Metric]: 1.5 mm. Product Height [Imperial]: 1 in.