Designed to convert ProBEAM bullet or flat style LED turn signal inserts to the custom flat bezel style. Matching installation hardware also included. The ProBEAM Flat Bezel Turn Signal Adapters attach to the ProBEAM bullet LED turn signal using a modular tab design. The metal tabs are pushed down by hand to secure the LED cluster inside the Flat Bezel, then attached to the Harley-Davidson OEM flat turn signal housing with 2 screws. Must be used with Custom Dynamics ProBEAM LED Turn Signals (sold separately).