| Year | 1917 |
| Date | 11-Oct |
| Volume | 37 |
| Issue | 859 |
| Page | 228 |
| Category | Workshop |
| Part | |
| Title | A Roughing Tool for Drilling Machine and a Useful Tool Holder |
| Author | C.L.P. |
| Notes | The roughing tool in use, two views of the complete roughing tool, split chuck for holding bushes, mandrel for expanding the chuck, details of toolholder |