PROPRIETATES PRINCIPALES:
1. Multi-functiones ad circulum formandum, volvendum, torquendum laternam, flectendum angulum
2. Materia ad chalybem vel tubos rotundos, quadratos vel planos tractata.
3. Ad anulum circumvolvendum, cylindrum superiorem sursum/deorsum manu movetur
4. DRO ad angulum ostendendum, facile operandum
Specificatio:
| RES | JG-AK | JG-AK-3 | JG-AK-4 | |
| Capacitas circulorum formandi | Tubus Rotundus | Φ32x2.5 | Φ32x2.5 | Φ48x3 |
| Tubus Quadratus | 40X40X3 | 40X40X3 | 60X60X2.5 | |
| Rectangularis | 30X10 | 30X10 | 40X12 | |
| Vectis Rotunda | Φ16 | Φ16 | Φ25 | |
| Capacitas volutationis voluminis | Vectis Rotunda | Φ14 | Φ14 | Φ20 |
| Quadratum | 16X16 | 16X16 | XX per XX | |
| Rectangularis | 30X10 | 30X10 | 30x12 | |
| Capacitas anguli flexionis | Vectis Rotunda | Φ14 | Φ14 | Φ20 |
| Quadratum | 16X16 | 16X16 | XX per XX | |
| Rectangularis | 30X10 | 30X10 | 30x12 | |
| Capacitas torsionis | Quadratum | 16X16 | 16X16 | XXVxXXV |
| Capacitas torsionis laternae | virga quadrata | \ | Octo per octo | Octo per octo |
| Vectis rotunda | \ | Φ8 | Φ8 | |
| Celeritas rotationis producta | R/MIN | \ | 16 | 18 |
| Potentia motoris | kw | 2.2 | 2.2 | 3 |
| Pondus netum / Pondus grossum | chiliogrammata | 360 | 505 | 505 |