Flap Wheel Sanding Discs 115mm x Bore 22.2mm ( 4½ inch ) Pack of 8 Mixed premium quality grit metal sanding discs. Suitable for all makes of 115mm angle grinders. Aluminium oxide construction. High quality disc ensures an exceptional lifespan. The conical shape provides an excellent angle for contour and edge grinding. For sheet metal and car body work. It is Ideal for heavy grinding on ferrous and non ferrous metals including stainless steel, as well as hard woods among many other applications. Diameter: 115mm ( 4½" ) Bore / Arbor Size: 22.2mm Maximum Safe Speed: 13280 R.P.M. / 80M/SContents 2 x 120 Grit: Fine 2 x 80 Grit: Fine - Medium 2 x 60 Grit: Medium - Coarse 2 x 40 Grit: Coarse Aluminium oxide flap discs are specially designed to be used with angle grinders for grinding flat surfaces. The conical shape provides an excellent angle for contour and edge grinding. Best used at a wider angle of 15 to 25 degrees. Features a depressed centre and are primarily used on alloy steel and low alloy steel.