- With locking ball
- Surface: chrome-plated, head polished
- DIN 3123, ISO 3316
- Made in Germany
- Drive: Square, hollow 12.5 mm (1/2 inch)
- Output: Square, solid 12.5 mm (1/2 inch)
- Dimensions / length: 76 mm
- Net weight: 0.12 kg
917-1: Length not according to DIN/ISO