Walthers Hex Wrench is a must-have tool that can be used as a socket or driver and makes quick work of loosening and tightening standard sizes of hex nuts and hex head screws (available from Walthers), as found on locomotives and other models. Walthers miniature hardware is a complete range of ready-to-use parts and tools for hobby projects, including wood, machine and nylon insulating screws, plus appropriate hex nuts and washers, in assorted standard sizes (machine and wood screws may be brass or brass plated). The Hex Wrench is part of the line of Walthers miniature hardware and tools.