DOUBLE ROW Our DOUBLE ROW CUP WHEELS offer an additonal row of segments for faster grinding speed and aggressive removal of material. The double row diamond cup wheels are used for concrete surface preparation and tilt wall finishing. Also perfect for fast grinding and rough de-burring. Ideal for the contractor that wants speed and performance. Use wet or dry on most hand-held electric or air grinders. Features: 5MM SEGMENT HEIGHT - long life performance VENTING HOLES - reduces core heat extending bade life AVAILABLE IN 2 ARBOR DIMENIONS: 7/8"-5/8" For Use with Grinder Flanges 5/8-11 Threaded - No Flanges, Threads Directly on the Grinder Usage: CONCRETE, FIELD STONES DIAMETER     SEGMENTS    SEG. HEIGHT        ARBOR      7"                   double row            5mm                   5/8"-11Thr