Wera, Kraftform 1/4" bit holding Turbo bit driver handleThe 826T Kraftform bit handle functions as a regular bit holding handle; but with the push of a button a one rotation of the handle becomes; through a clever mechanical miniaturized transmission system; a ''turbo charged'' 4 rotations of the bit. Complete with a Rapidaptor quick release magnetic chuck technology so nothing will slow you down in your superhuman screw driving actions. Takes all regular 1 4" drive bits and overall length is 146mm.