Button Bit, Drill Rod, Self Drilling Anchor Bolt manufacturer / supplier in China, offering Cop1440, Cop1550, Cop1638, Cop1838, Cop2238 Shank Adapter, T38, D38mm, L525mm, Cop1440, Cop1550, Cop1638, Cop1838, Cop2238, R38, D38mm, L525mm, Cop1440, Cop1550, Cop1638, Cop1838, Cop2238 Shank Adapter, R32, D38mm, L525mm and so on.