3157B 3156 3157 4157 Socket Female Adapter for Car Turn Signal Light Brake Light Tail Light Backup Reverse Light (Pack of 2) Pre-wired replacement socket female adapter for daytime running light, turn signal light, and brake light, etc. For 3 wires dual filament bulbs: 3157 3057 3155 3357 3457 4157 3157NA 4157NA Compatible with 2 wires single filament bulbs: 3056 3156 3456 4156 3155 Work with both traditional light and LED light