... Use: dry/wet coring4.Diameter : 25mm to162mm5.Goodness:high efficiency,no-chipping,long life6.Material: 65Mn,45#,HSS ,stainless steel,alloy steel ... granite, marble, concretes, asphalts, titles and wood with good quality. All of our products are exported to foreign countries and ... regions with the best quality. We are looking forward to cooperating with you for ...