Penta socket for use on pad-mounted transformers and secondary pedestals. T Handle Penta wrench model BW-99 is a popular lineman wrench and is a member of our BugWrench® tools family. This wrench is an all metal tool (non-insulated) and is a perfect lineworker tool for use on pad-mounted transformers and secondary pedestals. -All Metal (no insulating handle) -Heavy-Duty Construction -Deep Socket