Comparison of 255-I, 255-II, and 255-III
| SPEED (RPM) | OUTPUT | HANDPIECE WEIGHT | DIM. | TORQUE | ||
| I | 3,000 ~ 18,000 | DC 25V, 0.5A | 153g | 27mm | 40 g.cm | |
| II | 3,000 ~ 20,000 | DC 30V, 0.7A | 153g | 27mm | 45 g.cm | Feedback & Overload protection |
| III | 3,000 ~ 30,000 | DC 24V, 0.7A | 122g | 25mm | 55 g.cm | Feedback & Overload protection |