| Year | 1967 |
| Date | 03-Mar |
| Volume | 133 |
| Issue | 3,316 |
| Page | 238 |
| Category | Novices' Workshop |
| Part | |
| Title | Boring Tools & Boring Bars |
| Author | Duplex |
| Notes | Cutting angles for boring tools, boring tools with form ground heads, holders for boring tools, making small boring tools |