End Brush, Product Type End Brush, Quick Change System Not Applicable, Bristle Type Crimped Wire, Bristle Material Carbon Steel, Brush Dia. 1 in, Wire Dia. 0.02 in, Bristle Length 7/8 in, Grit Not Applicable, Overall Length 2 7/8 in, Compatible Tool Type Straight Grinder, Drill Press, Impact Driver, Pencil Grinder, Color Not Applicable, Primary Material Application Carbon Steel, Cast Iron, Wood, Connector Type Round Shank, Connector Size 1/4 in, Operating Speed – Maximum 22,000 RPM