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 3 in Primary Material Applicationn 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