grinding discs for concrete Product Description Features: 1.it design for concrete grinding machine 2.Four heads planetary running direction design can provide greater grinding force, can fast achieve flatness and brightness when grinding and polishing 3.has 24 pieces of discs,available for many kinds of abrasive pads. 4.It can equip with vacuum equipment to achieve dry and wet working mode. 5.Quick attack system to easy change the diamond tools by pulling down handle at rear wheel. 6.Adjustable pressure, adjustable feed speed and easy tool change system technology Model: HTG-800-4 Voltage: 380V 50/60Hz Motor power: 20Hp Grinding disc: 315*4mm weight: 620kg