| Year | 1952 |
| Date | 24-Jan |
| Volume | 106 |
| Issue | 2,644 |
| Page | 124 |
| Category | In The Workshop |
| Part | 107 |
| Title | Making a Twist Drill Grinding Jig |
| Author | "Duplex" |
| Notes | Saddle, holding-down bolt, baseplate, grinding wheel, adjusting spanner, finish, grinding jig with self-contained motor drive, wheel guard, dressing the grinding wheel |