... quality 4.Cutting edges: tungsten carbide 5.ISO9001 certificated. Hole Saw Cutter Solid Carbide Drill I.Product DescriptionSolid Carbide Drill metarial:Tungsten ... on portable and pillar drilling machines.offer the TCT hole saw sets with different sizeCE: MPA and ISO9002Packing; the normal package ... .222, Jiyang Middle Road, Yangshe Town, Zhangjiagang,Jiangsu,China Hole Saw Cutter Solid Carbide Drill