The 3-1/8 in Stainless Steel Knot Wire Cup Brush offers continuous brushing action for aggressive material removal. It is excellent for removing rust, scale, and weld splatter. The corrosion- and heat-resistant stainless-steel wire and durable construction make it suitable for use on stainless material. The X-LOCK quick change system provides up to 5x faster cup brush changes vs a standard angle grinder mount. Simply pull the release lever on the X-LOCK Angle Grinder and change the wire cup brush - no tools needed.