1)all size as customers'request
2)certification ISOand API
3)good quality and low price
4)type:center drill bit
Port: Tianjin
Minimum Order Quantity: 1 Piece/Pieces drill bit
Supply Ability: 350 Piece/Pieces per Month drill bit
Payment Terms: L/C,T/T,Western Union
Contact SupplierPackaging Detail: wooden case or as your requirement
Delivery Detail: within 7days or depend on your order
USE FOR
Applicable formation:Very soft with low compressive strength and high drillability,such as shale, clay, sandstone and conglomerate ,etc
Cutting struture:Largge dia.offset crested scoop compacts in inner row
Mian availability
| Size Ln. | mm | Bit Type |
| 8 1/2 | 215.9 | HA117 HA126 HAT127 HA217 HA417 HA437 HA447G HA517G HAS517G HA527G HA537G HAS537G HA547G HA547G HA617G HA637G |
| 9 1/2 | 241.3 | HA127 HA417 HA437 HA517G HA537G HA617G |
| 9 7/8 | 250.8 | HA116 HA117 HA126 HA127 HA417 HA427 HA437 HA517G HA537G HA547G HA617G HA627G HA737G |
| 10 1/2 | 266.7 | HA417GL |
| 10 5/8 | 269.9 | HA126 HAT127G HA417 HAT417G HA517G |
| 12 1/4 | 311.2 | HA116 HA117 HAT117G HA127 HAT127G HA417 HA437 HA447G HA517G HAS517G HA527G HA537G HAS537G HA547G HA617G HA637G |