Drive Size
| Philips Screw Diameter | Machine Screws | Sheet Metal Screws | Wood Screws | Wood Screws |
| – | – | – | Flat | Round |
| #2 | #1 | #1 | #1 | #1 |
| #3 | N/A | #1 | #1 | #1 |
| #4 | #1 | #1 | #1 | #1 |
| #5 | N/A | #2 | #2 | #2 |
| #6 | #2 | #2 | #2 | #2 |
| #7 | N/A | #2 | #2 | #2 |
| #8 | #2 | #2 | #2 | #2 |
| #9 | N/A | #2 | #2 | #2 |
| #10 | #2 | #2 | #3 | #2 |
| #12 | #3 | #3 | #3 | #3 |
| #14 | N/A | #3 | #3 | #3 |
| 1/4″ | #3 | N/A | – | – |
| 5/16″ | #4 | – | – | – |
| 3/8″ | – | – | – | – |