The present invention provides an improved device for simultaneously replacing a plurality of lug nuts through the use of computer technology, modularity, energy-efficiency, safety features and ease of use. Computer technology monitors and controls the torque on each lug nut. This invention also displays the loosening or tightening status of each lug nut on a small LCD screen. The present invention achieves modularity through a series of interchangeable gear train assemblies, contained in separate unitary housings, which correspond to respective vehicular wheel depth and wheel lug patterns. Also, magnetic concentric sockets are used to capture and hold lug nuts as they are removed from the vehicle's wheel and to remove and replace theft protection devices such as rim or wheel locks. This invention provides ease of use with user-friendly controls and a light-weight unitary housing that eliminates the need of assistance from another person.