Technical data
| Wrench size 1 mm: | 21 |
| D1 mm: | 28.3 |
| L mm: | 31.5 |
| Manufacturer item number shop: | 880-21 |
| Surface finish: | Nickel-plated, chrome-plated, matte satin-finished |
| Drive: | Internal square |
| Traction profile: | Yes |
| Material: | Chromium-vanadium steel |
| Drive size: | 3/8 inch |
| Output: | Hex socket |



