how to order.

Hollow Anchor Rods:  Types+Length

Drill Bits:  Head Design+Diameter+Thread

Coupling Sleeve:  Diameter+Length+Thread

Nut:  Length+Diameter

Plate:  Shape+Dimension

Our drilling bit in each production link of our factory will accept the rigorous testing, to ensure that produce efficient and reliable drilling tools to cope with a variety of different stratum drilling. We provide three different shapes of cross section of the bit selection: concave, convex and flat face, then with circular, cone, or conical tungsten carbide atoms.