... )Brand Name: ZHIDA, VIKDA, USGModel Number: drill bitsType: Twist Drill BitMaterial: High Carbon SteelUse: Metal DrillingType: Drill BitMachine Type: Drilling ToolCertification: DINMaterial: IronProcessing ... Type: ForgingUse: Coal MiningSpecificationsHSS Masonry Drill Bits Co8%, including all size High technical support Competitive low ...