Thanks Tom,not sure how many of each I'd need,I want to sand my 2 welding benches ,1 is an 8'x4' that's pitted & rusty the others the same size but just dull. Maybe 5 of each?
457x75,I've now done a little bit of research & am concerned my m/c is only 650w ,so may stall without sufficient power to reveal new grit surfaces as they clog.