Aluminium oxide For grinding, sanding and smoothing Suitable for metal, wood and plastic Removes rust and paint For sheet metal and car body work No backing pad required Suitable for all makes of 115mm angle grinders. Aluminium oxide construction. The conical shape provides an excellent angle for contour and edge grinding. Ideal for heavy grinding on ferrous metals as well as hard woods among many other applications. Aluminium oxide flap discs are specially designed to be used with angle grinders for grinding flat surfaces. Features a depressed centre and are primarily used on alloy steel and low alloy steel. Achieves a longer life when compared to resin fibre discs. Aluminium Oxide 40 Grit 115 x 22.2mm (4 1/2" x 7/8") Max: 13,300RPM 80 m/s Pack of 10 discs