Impressive Finish - The R444 Expert for Metal produces an impressive finish on metal surfaces. It features a stable vulcanised fibre backing that enables a steady constant grinding process. Furthermore, its semi-friable aluminium oxide abrasive grit is particularly suited for work on metal applications. It is intended for deburring, welding preparation and blending on carbon steel, mild steel, aluminium, non-ferrous metals and cast iron. It is also ideal for removing discolouration, stock and surface imperfections. The R444 Expert for Metal is compatible with Angle Grinders. The grit is bonded using fully synthetic resin on vulcanised fibre backing for high work stability and optimal sanding results. With 22.23 mm bore for standard locking nut angle grinders. Features and Benefits • Impressive Finish • R444 Expert for Metal: for an impressive finish on metal surfaces • The vulcanised fibre backing enables stability for a steady, constant grinding process Specifications Disc diameter: