... 1.Color:green coated 2.Technology:laser weled 3.Good quality and low price 4.Can make the customer logo Features ... MPA certificates3.Use: dry/wet coring4.Diameter : 25mm to162mm5.Goodness:high efficiency,no-chipping,long life6.Material: 65Mn,45#,HSS ,stainless ... granite, marble, concretes, asphalts, titles and wood with good quality. All of our products are exported to foreign countries and regions with ...