| Year | 2007 |
| Date | 12-Oct |
| Volume | 199 |
| Issue | 4,310 |
| Page | 432 |
| Category | Workshop |
| Part | |
| Title | A Polygonal Punching Tool |
| Author | Jacques Maurel (France) |
| Notes | Explains how to make hexagonal and rectangular sockets. Using the tool, manufacture, heat treatment, spring, clamping jaws, slide hammer, notes about hexagon dimensions, about screw material, about alignment |