| Year | 1955 |
| Date | 01-Dec |
| Volume | 113 |
| Issue | 2,845 |
| Page | 842 |
| Category | Expert's Workshop |
| Part | |
| Title | Getting the Right Angles (Tool grinding jigs) |
| Author | Duplex |
| Notes | Correct angles on the cutting edges. Adjusting the grinding table, a rest for the grinding head |