High quality cutting discs suitable for use by the professional or enthusiast alike. Popular with mechanics, fabricators etc... Suitable for 4 1/2" (115mm) angle grinders. Manufactured form aluminium oxide. This listing is for a pack of 20 cutting discs. Suitable for all materials including stainless steel / aluminium / steel / copper etc... Thickness; 3.2mm (thickness of the disc). Size; 115mm (4-1/2") diameter with a 22mm centre bore. Max 13,300 RPM