SIA blue line zirconium flap discs for the sanding of steel, stainless steel and aluminium, available in 115, 125 & 180 mm diameters and a variety of grits. Flap discs are essentially rectangular flaps of abrasive material glued to a fibreglass backing plate. They boast a number of advantages over a conventional sanding disc lasting up to twenty times longer, reducing your downtime and unit cost to boot.
Other added benefits are that no backing pad is required, stock removal is very aggressive and the operator benefits from less noise & vibration. Their conical design also makes them great for edging & contour work.