【Perfect Size】Outer Diameter:4.5 Inch (115mm) Inside Diameter:7/8 inche Thickness:3/64 inch.Operating up to 13,300 RPM.Suitable for most angle grinders,air cut off tool and electric cut off tool 【High Quality & Performance】Our metal cutting disc are made of aluminum oxide grains which is durable and safety.Also provides aggressive cutting action and longer service life. 【Multiple Applications】Our cutting wheels are ideal for cutting iron,plastic,steel,stainless steel,and fiberglass as well as all other ferrous metals.