SIT Twist Knot Cup Brushes are Ideal for removing rust, paints and incrustations. Our light duty range is an alternative for lighter applications having less knots and no retaining ring without compromising safety. Twisted Knot Cup Brushes are good to be used to clean large area efficiently and more aggressive compared to crimped wire brushes. Good for use on flat surfaces. M10 fitting for 100mm machines Light duty, cleaning of large metal surface. Weld scale and corrosion removal. Pre-paint surface preparation. Ideal for cleaning welds and fabricated steelworks. Suited for use on appropriate angle grinders. TZ70 M10 THREAD 70MM DIA.