| Code | Drill_Bit_Grade_TBG |
| Name | Teeth-Bearing-Gauge Drill Bit Grading |
| Parents | Property > Grade |
| Description | The TBG, Teeth-Bearing-Gauge, grading assigned to a drill bit based on particular criteria. The TBG has 5 fields: Bearing, Broken Teeth, Gauge, Gauge Out of Hole, Tooth Wear. |
