| Year | 1953 |
| Date | 24-Sep |
| Volume | 109 |
| Issue | 2,731 |
| Page | 364 |
| Category | Workshop |
| Part | |
| Title | Making Small Boring Tools |
| Author | "Duplex" |
| Notes | Tool-holder, making the tool-bits, checking clearance, quenching the tool, hardening and tempering, larger boring tools |