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Trifin / universal screw driver


My design “Trifin“ is a universal concept for the handles of screwdrivers and other turnable tools.
Many weaker and older people do not have enough power in their hands to transmit the torsional moment needed to loosen a screw to a handle of a screw driver. Having enough power to transmit high moments, stronger people sometimes start cramping after working a longer time with a screw driver.
The universal solution called “Trifin“ is a handle that
enables the user to transmit higher torsional moments using less power.
“Trifin“ is manufactured as an injection moulded part with an inmoulded piece of steel.


Hochschule Coburg

Hochschule Coburg
Integriertes Produktdesign
Coburg, Germany

Prof. Wolfgang Schabbach


Julian Rathmann

Julian Rathmann
Adendorf, Germany

Julian Rathmann