Specially developed for cast iron, the thickened high manganese steel substrate is welded with high-quality diamond particles, cutting sharp and durable without deformation. Compared with other cutting blades, it has higher efficiency and less cutting dust. Wheels Size: Diameter 7" (180mm), arbor hole 7/8", adapter ring: 5/8", thickness: 0.06 "(1.6mm), operating speed up to 8700 RPM. Suitable for 7 inch angle grinders with 7/8” and grinder shafts with 5/8” spindles. Adjustable aperture: The 7 inch metal cutting wheel features a 7/8 inch (22.23 mm) arbor hole, and includes the additional adapter of 5/8", making it easy to install and compatible with various handheld saws and angle grinders. Safe and Durable: The 1.6mm thickness is not easily deformed, and the diamond cutting wheel can perform 6000+cuts on metal, with a longer service life and greater durability. Scope of application: Diamond cutting wheels can easily cut metal materials such as screws, steel bars, metal pipes, metal plates, stainless steel, etc. Not recommended for use on ceramic tiles. MASTER DEPOT Diamond Cutting Wheel 7 Inch with 5/8"- 7/8" Arbor, Cut Off Wheel for Metal with 5000+ Cuts on Rebar, Steel, Iron and INOX, Angle Grinder Cutting Disc, 2 Pack