The classic STEMFIE spanner tool has been revised and is now available for download. It has new features as described below.
- A 2BU ruler on the bottom and sides surfaces to measure block units (BU) divided into halves and quarters.
- Wider waist measuring precisely 1BU (12.5 mm)
- The gripping centers and the threaded hole are now located at evenly spaced block units.
This toy is unsuitable for children under three years due to choking hazards!