Item #: 32109761Brand: Brush Research Mfg. Model #: BNH614Exact Tooling IR#: 04 Features and Benefits Carbon steel is a soft, durable material that is economical and easy to shape. It is commonly used for general purpose applications. Knotted brushes are made up of multiple filaments/wires bundled together to provide the most aggressive brushing action. Product Specifications Brush Diameter (Inch) 3/4 Fill Material Carbon Steel Filament/Wire Diameter Range (Decimal Inch) 0.0101 - 0.0200 Filament/Wire Diameter (Decimal Inch) 0.0140 Wire Type Knotted Bridled No Pilot NonPiloted Flared NonFlared Maximum RPM 20000 Shank Diameter (Inch) 1/4 Encapsulated No Hollow Center Yes Shank Included Yes Shank Length (Inch) 3/4 Shank Material Steel Trim Length (Inch) 7/8 Brush Diameter (Decimal Inch) 3/4 Shank Diameter (Decimal Inch) 1/4