1mm Stainless Steel Cutting Discs Metal Cutter Blade Discs 4-1/2 Angle Grinders. Professional thin cutting discs for commercial or occasional use 1mm thick cutting disc Marked as stainless steel cutting discs as stainless steel is known as the strongest material so basically if it will cut stainless steel then it will pretty much cut anything Metal cutting discs 4-1/2″ (115mm) cutting discs Cutting discs suitable for all 4-1/2″ angle grinders Suitable for cutting a wide range of materials including stainless steel, steel, copper, brass, aluminium etc…