Item #: 37049897Brand: WALTER Surface Technologies Model #: 15I503Exact Tooling IR#: 04 Features and Benefits Coated and non-woven combinations are designed for grinding and polishing in a single step. Type 28 flap discs are designed for high performance grinding on steel and iron. They are used in a wide range of grinding operations and can be used at a shallower working angle. Cooler cutting and more durable than natural aluminum based products, ceramic provides a sharp, high purity grain. Commonly used for precision grinding of steels, hard alloys and exotic materials. Arbors require adapting nuts. They eliminates cross threading. Product Specifications Abrasive Type Coated & Non-Woven Combo Flap Disc Type Type 28 Disc Diameter (Inch) 5 Abrasive Material Ceramic Attaching System Arbor Center Hole Size 5/8-11 Backing Material Plastic Maximum RPM 12200 Series 15-I; Enduro-Flex Color Orange