ERGONIC Handle

There are numerous ergonomic handle design:  It is always the user's hand that has to adjust to the handle.  Felo ERGONIC is the only handle adjusting to the individual hand!   

The handle fits perfectly into the hand at all times.  Hand and handle interlock, causing less strain and work fatigue, allowing higher maximum torque!  Responsiveness of material results in enhanced sensitivity and perfect control of torque.

http://en.americantoolthailand.com/FELO-Screwdrivers-pliers/Ergonic-Screwdriver