| Year | 2000 |
| Date | 14-Jul |
| Volume | 185 |
| Issue | 4,124 |
| Page | 34 |
| Category | Workshop |
| Part | |
| Title | Caliper Knurling Tool |
| Author | Len Walker |
| Notes | Describes the construction. Body, upper and lower arms, pivot, clamp screw, head, pivot, nut and spring, packing, knurls, in use |