Number of blades:4pcs*2sets blades Working diameter and blade specification:Working Diameter with 157 x 75cm fand Blade 270*150mm Adjustable blade:The regulating handle can help the operator to precise blade adjustable Operating height adjustment:The operating hright can't be changed. Safety switch control, making machine operation safer:Savety switch can help the operator to have a safe working environment. Safety and complete certification:We gained UL, CE, GS and China Gold supplier and so on, because we think the quality of product always is the star.We obtain worldwide authentication ,such as VDE,CE, GS,UL, ETL, and so on. Quick reply to customer questions within 5 hours Delivery date :within 5-7 days for Sample ready and mass production 15-45 days after receive the deposit.Q: Are you a factory or trading company? A:We are the manufacturer Q: Can you provide the free samples? A:No sample fee for regular products Q: How does your factory do regarding quality control? A: 100% raw material inspection and 10% Finished product inspection. Q: Do you have a minimum order quantity? A: Our MOQ is 5 PCS for very item Q: Can you OEM or ODM? A:15-25 days after receiving the deposit payment . Applications for: This machine for concrete surface, coarse and fine grinding machine. After this machine the surface more smooth, level off, can greatly improve the compactness of concrete surface, resistance to wear. Can greatly improve work efficiency, the artificial operation can be improved more than dozens of times. This machine is widely used in concrete pavement, ground level ground, airport, floor, etc.