A screwdriver handle comprising a base portion adapted to accommodate a screwdriver shaft member; at least one arm pivotally connected to the base portion; a locking sleeve mounted on the base portion; and an electric motor operatively connected to the base portion and adapted to rotate the screwdriver shaft member in any of a clockwise and counter-clockwise manner. Other embodiments include removing specific elements from the water source and utilizing those elements. The baffles are arranged in the receiving space to divide the receiving space into a plurality of convection channels that are in fluid communication with each other. Synchronization of attachments to emails in the local cache is also independently performed, thereby bypassing synchronization that is normally performed by the email application while in the online mode. The coatings include a region containing a polycationic peptide, such as, for example, the polycationic peptide known as R7. A rotating priority queue manager in accordance with the present invention may include a plurality of source data channels, a corresponding plurality of processing resources, and an arbitrating interface directing the flow of data from the source channels to the processing resources where the data must flow over a shared data path.