10 5/8"(270mm)
Hebei, China (Mainland)
T/T, L/C, D/A, D/P, Western Union, MoneyGram
30000pcs per month
Shipped in 5 days after payment
steel box
Tungsten Carbide
Journal bearing
PDC bit, Diamond drill bit
Oil,Gas,Water Well Drilling
Soft to Hard Formation
3,4,5,6,7,8,9
2 3/8"~7 5/8"
Casting Forging