EDCO Magna-Trap® 10" Turbo Grinder with 5 HP electric motor. Grind wet or dry with the 10" of working width which will grind approximately 400-500 sq. ft. per hour at 1/16" with an EDCO Diamond Disc. The RIGID head assembly is ideal for grinding uneven expansion joints, high spots, joint curls and bridge decks, to remove coatings and grinding rough concrete surfaces. The FLEX head assembly is ideal for preparing a smooth, flat floor to receive a new coating, removing coatings and grinding rough concrete surfaces while grinding surfaces 4x faster than a traditional floor grinder!