Forney 2 3/4 x 5/8-11 Knot Wire Cup Brush with Bridle is very popular for use with angle grinders. For heavy duty use, on preparing metal surfaces prior to painting. Removal of rust, slag weld scale or concrete waste. This knot cup brush has a wire diameter of .020 and max RPM of 12,500. The bridle on this knot cup brush is a feature that is designed to keep the knotted wires from flaring outward when in use.
