1.Type:center drilll bit 2.Material:HSS,HSS-E,etc 3.Coating:Tin,Bright, ... center drilll bit Features:1.Drill bits:center drilll bit2.Material:HSS,HSS-E etc3.Coating:Tin,Bright,Ticn,etc4.Complete in specification5.Type:center drill ... have any question, please feel free to contact with us. Center drill bit