Handle the sharp edges of roof decking and sheet metal with this 5/32-inch Gemini Metal Decking A AO Type 01/41 high speed cut-off wheel. With two full reinforcing layers and a high-performance aluminum oxide abrasive, this wheel works with low-power, high speed machines to get through hard and soft carbon steel quickly, consistently and at a good price. The patented Universal Arbor lets you use this wheel on a 1-inch or 20-millimeter arbor.