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| 1 - Staff with wheel | 12 - Pin for gears n°11 |
| 2 - Interchangeable tip | 13 - Guide bridge |
| 3 - Ball bearing | 14 - Auto-threading universal screw |
| 4 - Ball bearing spacer | 15 - Driving toothhead lever |
| 5 - Conical gear | 16 - Spacer |
| 6 - Spring spike | 17 - Spring |
| 7 - Screw for spring spike | 18 - Plug spring-holder |
| 8 - Pair of gears | 19 - Cheek right side |
| 9 - Pin for pair of gear | 20 - Cheek left side |
| 10 - Bush staff-holder | 21 - Belt |
| 11 - Pair of gears |