ToolSol Professional Hand Tools are engineered for challenging applications. New patented ‘last chance’ extractor inserts for wrenches and sockets as the whole range only requires two wrenches (14mm and 19mm). Not necessary to have a separate wrench for each nut size. Turns either a standard socket or wrench into one, which can turn a severely damaged fastener. Grips all the way around a fastener and allows even 85% rounded off fasteners to be turned. Securely grips many different types of fasteners: six point, twelve point, hex, spline, etc.