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 Applicationn Cast Iron Nickel Alloy Stainless Steel Steel Titanium Tool Steel Product Type Plug Series NorZon Plus 4NZ ZA Maximum Operating Speed 24 190 RPM Specification NZ TAF Tip Type Round