Specifications: Cutting disc: Diameter: 75mm Opening: 9.5mm Thickness: 1.6mm Maximum speed: 20500 RPM Serrated disc: Diameter: 75mm Hole size: 10mm Grit: 80 Wool felt disc: Diameter: 75mm Hole size: 10mm HSS circular saw blade: Diameter: 75mm Hole diameter: 10mm Thickness: 1.0mm Number of Teeth: 72T. Maximum speed: 19500 RPM Included components: 10 x Cutting Discs 5 x Flap Discs 3 x Wool Felt Discs 2 x HSS circular saw blade.