US Patent 9278445 Drive tool device having connectable arms

A drive tool device includes a drive handle member having three barrels attached to the end portions and the middle portion, the two end barrels each include a non-circular engaging opening communicating with the bore of the handle member, and the drive handle member include one or more non-circular engaging orifices formed in either of the barrels, and a driving shank element includes a non-circular cross section for engaging with the non-circular engaging orifices of the drive handle member and for allowing the drive handle member to be driven by the driving shank element selectively and for allowing the driving shank element to be driven by the drive handle member selectively.