Simplify your metal conditioning work with this easy-to-use, long-lasting and quick cleaning 4” Makita KNOTTED Wire Cup Brush, designed to work with your 7"-9” Angle Grinder. Ideally suited for removing heavy corrosion, rust, paint, spatter and scale removal while also cleaning weld edges and deburring metal; great for cleaning castings, structural steel and sheet metal while also roughening for adhesion, finishing for appearance and preparation prior to plating or painting. Holding the brushes at an angle of no more than 5°, allowing only the TIPS to do the work with LIGHT, CONSTANT pressure ensures full wire-workpiece contact and maximal wire life. WARNING: Incorrect angles or excessive pressure makes the wires heat up, become fatigued and prematurely break, while also may show up as bluing of the wires and the "groaning" of the angle grinder from the excessive load. Unlike a coated abrasive, a wire brush or wheel is designed to condition metal surface area and is NOT a metal removal accessory. Carbon Steel Brushes should only work on Carbon Steel to avoid cross-contamination.