EDCO 7 Diamond Disc Turbo Concrete Floor Grinder Accessory Rental The EDCO 7 Diamond Disc Grinder is an EDCO Turbo Grinders accessory. These grinders will get the job done up to 4 times faster than conventional floor grinders.This 7 17 segment, dry cut diamond cup wheel is ideal for grinding hard surfaces, feather edging sidewalks, curbs and ...