Proper Drill Bit Size
| SCREW GAGENUMBER | SHANK HOLEHARD & SOFT WOOD | PILOT HOLESOFT WOOD | PILOT HOLEHARD WOOD |
| 12 | 1/16″5/64″3/32 | 1/64″1/32″1/32″ | 1/32″1/32″3/64″ |
| 3 | 7/64″ | 3/64″ | 1/16″ |
| 4 | 7/64″ | 3/64″ | 1/16″ |
| 5 | 1/8″ | 1/16″ | 5/64″ |
| 6 | 9/64″ | 1/16″ | 5/64″ |
| 7 | 5/32″ | 1/16″ | 3/32″ |
| 8 | 11/64″ | 5/64″ | 3/32″ |
| 9 | 3/16″ | 5/64″ | 7/64″ |
| 10 | 3/16″ | 3/32″ | 7/64″ |
| 11 | 13/64″ | 3/32″ | 1/8″ |
| 12 | 7/32″ | 7/64″ | 1/8″ |
| 14 | 1/4″ | 7/64″ | 9/64″ |
| 16 | 17/64″ | 9/64″ | 5/32″ |
| 18 | 19/64″ | 9/64 | 3/16″ |
| 20 | 21/64″ | 11/64″ | 13/64″ |
