Stonegrinding machine Advantage: 1.the grinding speed is variable. 2.can switch the speed from 3000r/min to 11000r/min 3.it is easy to use because of its small size. 4.it can also reach the place where the big machinecan not reach. 5.low cost and can achieve efficient results Power: 2300W VOLTAGE: 220V 50HZ OR 110V 60HZ MEAS: 520*220*258MM G.W 28KG/PC MAX GRINDING BOARD THICKNESS: 20mm ;30mm;40mm Acceossies: ROUTER BITS: complete process need one set(5pcs) 1sintered emery wheels 1electroplated emery wheels 3polishing emery wheels total price 20usd/set(thickness:20mm) Honly Slogan:For professional, then keep ahead.