Bit purely dispel hole in the screwdriver reverse. Turn Bit start slowly in reverse reindrehen. It says so in the manual so I did it. When I tried to open the Schreube turned by the bit and found no Wiedrstand. I let the drill run slowly, the bit finmdet no resistance. I spend more gas and amazed the bolt hung already on bit. With just a quarter turn of the bit was stuck and the bolt already dissolved. Who has a problem with this tool piece he receives the solution Thanks to the manufacturer.