Steel tooth drill bit

1)brand:Longxin

2)uesd for:oil well drilling and water well drilling

3) color:blue  and meet your demand

4)IADC: 117  127 137 217  227  237 .etc

 5)nozzle:3 pcs

6)materila: high manganese steel

7)type:steel tooth  tricone  drill bit 

8)machine type:drilling tool

roller cone drill bit