About this item 【Grinding Wheel Set】4-1/2 inch angle grinder wheel set consisted with 3 kinds of grinder discs: 8 pcs cutting wheel,1 pcs grinding wheel,1 pcs flap disc. 【Cutting Wheel】10 PCS cut off wheels 4 1/2 inch has passed the CE&ISO certification, built for a more robust and safety cut off wheels.Fast burr free cutting with minimal material loss, Will not splash and cause injury. 【Grinding Wheel:】 Premium 4-1/2 "* 1/4 "* 7/8 "Grinding Disc for metal and stainless steel, T27 bevel type, A24T Aluminum Oxide Grains for Aggressive Grinding and High Stock Removal. Operating up to 13,000 RPM and 80M/S. Meet almost all your general polishing requirements. 【Flap Disc: 】Flap discs, Constructed of industrial grade premium zirconia. Durable,good abrasion resistance,and anti-clogging.4.5" * 7/8 inch arbor size flap disc is compatible with most air and electric angle grinders. 【Long Lasting Discs】Our disc is made of iridium-plated white corundum, so our cut-off wheel has 2 times the cutting life of a normal cutting wheel. These cutting discs are made by a special process of alumina abrasive to ensure extra toughness, sharpness, and durability. › See more product details