Handle design adapted to screw sizes
Our handle size concept at Wiha is a completely newly developed handle design which has emerged based on various investigations and the results of research in the fields of anthropometrics and ergonomics, and practical applications.
The focus is on the “constant hand size”. The four different SoftFinish® handle sizes mean that each handle offers the ideal balance of guidance, speed and torque for the respective fastening task. The handle size concept means that the user can both quickly screw in screws and transmit high levels of force. The ideal length of the screwdrivers for guidance remains almost constant despite varying functions.