Kullanımı
Kömür madenciliği
Advantage
high pressure button drill dth hammer bits
Color
Yellow, black,or As your request
Face shape
Center drop/Flat/convex/concave/double gauge face bits
Button shape
Round/parabolic/Ballistic/sharp/falt bottons
Quality
95% similar to famous brands
Advantages
high quality and factory prices
Steel
Baosteel Group High quality steel