Tiger® Depressed Center Wheel, Performance Line Superior Life and Cut, 5 in Wheel dia, 1/4 in Wheel Thickness, Quick-Change Connector, 24 Grit, Coarse Grade, Ceramic Alumina Abrasive, Wheel Type Number: Type 27, 12200 rpm Maximum, Resin Bond, Applicable Materials: Tool Steel, Inconel, High Nickel Alloy, Titanium, Armored Steel, Stainless Steel and Hard-to-Grind Metals, 5/8-11 Center Hole Thread Size, Wheel Hardness: R, ANSI B7.1-2010 Specifications Met.Weiler's high quality line of grinding wheels help metal fabrication professionals get the most demanding jobs done right and done fast. Weiler® 58328 Tiger® Performance Line Superior Life and Cut Depressed Center Grinding Wheel, 5 in dia x 1/4 in Thick, 24 Grit