Power Probe AA1 Bulb Adapter 1156 type light bulb sockets Fits The Hook by Power Probe Fits Power Probe III Fits Power Probe ECT2000 Works with the Power Probe Gold Series Lead Set 1156 bayonet type light bulb socket Adapts Standard 4mm Banana Jack Test Leads Standard 4mm Banana male plug Provides connection to automotive lighting circuit Heavy Duty Construction