The FENNER SMSRT Power Plus offers a rugged design and a 50% increase in the power to weight ratio over the classic vedrsion. It also benefits from a simple to fit and quick realasing Tapper-Grip bush. This more compact version offer easier handling and features a new easy fit tourque arm, as well as an increased range of bore sizes and now four ratios from 25: 1 to 5: 1 for extra flexibility.