Square Tip Grinding Plug, Abrasive Material Zirconia Alumina, Abrasive Type Type 18, Compatible Tool Type Die Grinder, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 20, Overall Diameter 1 1/2 in, Overall Length 2 1/2 in, Primary Material Application Cast Iron, Nickel Alloy, Stainless Steel, Steel, Titanium, Tool Steel, Product Type Plug, Series BlueFire 4NV ZA, Maximum Operating Speed 24,190 RPM, Specification BLUEFIRE 20-S, Tip Type Round