| Type of tool | holder |
| Kind of holder | E6,3mm, universal |
| Application | screwdriver bits |
| Socket size - inch | HEX 1/4" |
| Version | magnetic |
| Symbol | Version | Overall len. |
|---|---|---|
| [mm] | ||
| WERA.893/4/1/K | without supporting ring | 50 |
| WERA.899/4/1 | with retaining ring | 100 |
| WERA.899/4/1L | with retaining ring | 152 |