| Year | 2023 |
| Date | 06-Oct |
| Volume | 231 |
| Issue | 4,727 |
| Page | 517 |
| Category | Workshop |
| Part | 2 |
| Title | The Twist Drill Bit |
| Author | Neil Raine |
| Notes | Remembers the 160th anniversary of the invention by Stephen A.Morse. The cutting action of a drill bit, a factory ground drill bit, damage, functional properties of some design elements of the twist drill bit, conclusion, references |