PWSZS 2 angle grinder attachments, for common angle grinders (e.g. from Parkside, Bosch, Black&Decker, Einhell, Makita, Kress, Metabo)Propeller Grinding Wheels Set, 4 Pieces,For processing steel, stainless steel, cast iron, steel sheets as well as wood,Grain: K40 (for wood); K40, K60, K80 (for metal)Velcro sanding pad To fasten the sandpaper using Velcro,Clamping: m 14 Propeller Grinding Wheel Set, 4pcs: Number of Turns: Max. 12,250/min; what mentioned before. 80 m/sVelcro sanding pad: Revolutions: Nmax. 12,200/min; what mentioned before. 80 m/s