Our tapered drill bit is from alloy steel and tungsten carbides by forging treatment. it can connect with tapered drill rod well for air leg or hand-held rock drill machines for drilling holes in gold and coal mining, marble and granite quarries, stone project, tunnel, water conservancy, etc.Applicable Industries: Applicable Industries: Construction works , Energy & Mining, drifting, tunneling Weight (KG): 0.3 Type: DRILL BIT Machine Type:Drilling Tool Material: High Manganese Steel, Tungsten Carbide Processing Type:Forging Use:Ore Mining Color:customized Usage:Drilling and Construction Application:Stone Drilling, Coal Mining,Quarry drilling, Construction Certification: ISO9001 Advantage: high quality ,High Performance button: 6-8 buttons Heat treatment: Fully carburization