Product Features Durable Material: Bonded with corundum and white alundum grain, these cutting discs have excellent cutting in metal and stainless with longer service life. Advantege: 0.045inch ultra thin design for cutting with minimal material loss, make cutting project more efficient. Specification Out Diameter: 115mm (4-1/2") Aperture: 22.2mm (7/8") Thickness: 1.2mm (0.045") Maximum speed: 13,290RPM Package Content: 10Pcs Cutting wheels Compatible with all 4-1/2 inch angle grinders with 7/8-inch arbor, operating up to 13,290 RPM. For best results, consider not pushing too hard on the wheel. 10pack 4-1/2 x 7/8-inch metal/stainless steel cut-off wheel set has high tensile, impact and bending strength, accurate cutting performance, precision, stability and integrity. The wheel unique combination of aluminum oxide abrasives and its 0.045inch profile allows for faster, cleaner cut thru thicker material which creates less heat build up on the cutting surface. Widely Used Qulckly and effortlessly cut through all metal, steel and stainless steel parts including rebar, structural and galvanized steel, sheet metal, structural tubing, black steel, cable and small to medium diameter solid pieces.