Tiger Aluminum 6 inch type 27 depressed center cutting wheels are specifically designed for high performance cutting and extended wheel life on aluminum. These wheels blend abrasive grains with WeilerÃs non-loading formula, resulting in a fast and consistent cut rate on aluminum. The depressed center provides added clearance when working at a constrained angle. Wheel thickness of .045" is ideal for cutting tubes, bar stock and large cross-sections with a right angle grinder. The 7/8" open arbor offers a cost-effective mounting option when using adapting nuts.