| Year | 1971 |
| Date | 16-Jul |
| Volume | 137 |
| Issue | 3,421 |
| Page | 692 |
| Category | In the Workshop |
| Part | |
| Title | An Improved Die and Toolholder |
| Author | D.H.Downie and D.H.Culling |
| Notes | The locating collars, the boring bars, drill chuck arbor, the Morse taper socket, detail machining of parts |