Attwood LightArmor Plug-In Light Base - Introducing LightArmor Plug-In Bases, a new line of light bases designed for premium performance, styling, and durability. Across the entire product line, you get the intelligent engineering that LightArmor is known for. Threaded Locking System for a secure fit Unique cover design Stays secure while underway or trailered Low-profile prevents water from pooling on top surface