This Faithfull 120 Grit Aluminium Oxide Flap Disc is suitable for smooth grinding of mild steel, carbon steel and alloys. Specification: x bore: 115 x 22mm. The Faithfull Aluminium Oxide Flap Discs are suitable for heavy-duty applications. The 72 flaps enables fast stock removal with minimal risk of damage through gouging or discolouration. A lightweight disc design reduces operator fatigue, and is easier to control, providing better quality and consistency of your surface finish. The layered disc is cooler, and quieter than typical grinding/abrasive discs, with less vibration and reduced glazing. Benefitting from a longer life (30 x longer than fibre discs) and self-sharpening flaps, resulting in fewer disc changes. The slightly conical shape is ideal for grinding at 15-25 degree angles on contoured surfaces. For use with angle grinders. Faithfull A06 B1022