- QH ratchet heads have a small tightening radius to facilitate effective tightening in cramped areas. The square drive QH10D-1/4, QH15D-3/8 and QH22D-1/2 models are one size smaller than the regular models, so their sockets are cheaper.
- Ask for inventory status and price.
| Model | Tohnichi Head Size | Sq.Drive (mm) | Sq.Drive (in) | Outside Width (mm) | h (mm) | b (mm) |
| QH8D | 8D | 6.35 | 1/4 | 23 | 17.5 | 7.5 |
| QH200I-2A* | 10D | 26 | 22 | 11 | ||
| QH10D-1/4 | ||||||
| QH10D | 9.53 | 3/8 | ||||
| QH12D | 12D | 32 | 25.6 | |||
| QH750I-3A* | 15D | 37.5 | 33.5 | 14 | ||
| QH15D-3/8** | ||||||
| QH15D | 12.7 | 1/2 | ||||
| QH19D | 19D | 40 | 38.4 | 15.4 | ||
| QH22D-1/2 | 22D | 21.5 | ||||
| QH22D | 19.05 | 3/4 | 51 | 46.5 | ||
| QH27D | 27D | 70 | 49.7 | |||
| QH32D | 32D | 25.4 | 1 | 74 | 55.7 | 26.5 |
Notes
- *QH750I-3A available until stock depleted. Replaced with new model QH15D-3/8 featuring new sq.dr. ratchet design.
- *QH200I-2A available until stock depleted. Replaced with new model QH10D-1/4 featuring new sq.dr. ratchet design.
- **QH15D-3/8 Max Torque Tolerance 100NM.
- Protective Covers.
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