? Premium aluminum oxide grain for excellent cutting on carbon steel ? Advanced formulation for free cutting; maximizes the performance of conventional aluminum oxide abrasive ? Ultra thin side reinforcing for maximum cut rate and minimum kerf loss; ideal when precise thin cut is desired ? Reinforced for use on high-speed portable grinders ? Made in the USA ? The Norton small diameter Type 01 cut-off line consists of Type 01 straight wheels from 1-1/2 In.-6 In. diameters. These wheels come in ultra thin 0.035 In. for quick burn/burr free cutting to 1/8 In. for more durable applications. All are reinforced for the demanding nature of portable cut-off.