A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. Keys that automatically align the light beam assemblies on each of the boards precisely control placement of the assemblies on the board. More specifically, the present invention discloses methods of using recombinantly expressed andor endogenously expressed proteins in various screening procedures for the purpose of identifying therapeutic antibodies and therapeutic small molecules associated with diseases. A plurality of applications access the central database repository, the applications being automatically adaptive to the dynamic reconfiguration of the product information.