| Clue | Source | Date |
|---|---|---|
| Stick which fits into holes in the abutting portions of two pieces (5,3) | ||
| Peg which holds together two abutting pieces (5,3) | ||
| Cabinetmaker's cylinder | The Washington Post | 22 Apr 2018 |
| Cabinetmaker's cylinder | LA Times Daily | 22 Apr 2018 |
| Cabinetmaker's cylinder |