Forney 72892 Wire Cup Brush, Cable Crimped Wire, Industrial Pro 4" x .009" Wire with 5/8"-11 & M14x2.0 Arbor & Protective Guard When the brush is working, the guard opens up into a shield that prevents wire projections from brush Guard also prevents other projections and debris from the work surface Patented multi-thread fits on both 5/8-inch-11 and M14 X 2.0 angle grinders. Protective shield provides safety before, during and after work