A tool to tighten and loosen round nuts with notches. Sizes fit to the outer diameter of round nuts. Made from selected alloy steel, hooks are hardened and tempered.
| Code | Circle Dia. mm | Overall Length mm | Code | Circle Dia. mm | Overall Length mm |
| 611206 | 12-14 | 108 | 611216 | 80-90 | 271 |
| 611207 | 16-20 | 108 | 611217 | 92-100 | 286 |
| 611208 | 25-28 | 136 | 611218 | 110-115 | 333 |
| 611209 | 30-32 | 136 | 611219 | 120-130 | 333 |
| 611210 | 34-38 | 160 | 611220 | 135-145 | 385 |
| 611211 | 40-42 | 173 | 611221 | 150-165 | 385 |
| 611212 | 45-50 | 196 | 611222 | 175-195 | 466 |
| 611213 | 52-55 | 208 | 611223 | 200-220 | 466 |
| 611214 | 58-62 | 232 | 611224 | 230-250 | 567 |
| 611215 | 68-75 | 247 | 611225 | 260-280 | 567 |