chisel bit from China coal group

chinacoal07alloy chisel bit , coal mining drill bit,Cutting Toolschisel bit from China coal group1.Increased penetration rate2.Longer service life3.Lower cost4.Excellent cemented carbideChisel bits are widely used in drilling holes with a depth size less than 5 meters and diameter scope in 20-45mm by light-duty hand hold drills,major use in natural dimensional stone quarry for small hole drilling,block ’s trimming and 2nd splittingfor small blocks.To match Hexagonal 22mm and