Standard HDD Drill Bit
Vermeer® Compatible Bits
| Size | Type | Bolt Pattern |
| 3" | Standard | Small |
| 3-1/2" | Standard | Small |
| 4-1/2" | Standard | Small |
| 5" | Standard | Small |
| Size | Type | Bolt Pattern |
| 4-1/2" | Standard | Large |
| 5" | Standard | Large |
| 5-1/2" | Standard | Large |
| 6" | Standard | Large |
Ditch Witch® Compatible Bits
| Size | Type | Bolt Pattern |
| 3" | Standard | 5 Bolt |
| 3-1/2" | Standard | 5 Bolt |
| 4" | Standard | 5 Bolt |
| 4-1/2" | Standard | 5 Bolt |
| 5" | Standard | 5 Bolt |
| Size | Type | Bolt Pattern |
| 5" | Standard | 6 Bolt |
| 5-1/2" | Standard | 6 Bolt |
| 6" | Standard | 6 Bolt |