Miniature End Brush, Product Type End Brush, Quick Change System Not Applicable, Bristle Type Crimped Wire, Bristle Material Stainless Steel, Brush Dia. 1/4 in, Wire Dia. 0.005 in, Bristle Length 7/16 in, Grit Not Applicable, Overall Length 2 1/4 in, Compatible Tool Type Die Grinder, Drill, Impact Driver, Pencil Grinder, Straight Grinder, Color Silver, Primary Material Application Stainless Steel, Connector Type Round Shank, Connector Size 1/8 in, Operating Speed – Maximum 37,000 RPM