Mounted Cup Brush Carbon Steel Wire ¼” Shank sku: 1145460 Mounted cup brush with 0.3mm diameter carbon steel wire, allow for fast surface cleaning. The brushes are designed to follow contours and intricate surface patterns. Available in 2-1/2” (63.5mm) diameter. Shank diameter is ¼” (6mm). Maximum RPM is... MSRP: On Sale: $4.45 Add to Cart Compare