ATTWOODLIGHTARMOR 2-PIN PLUG-IN BASES•Composite Black Cover Rectangle•Threaded locking system for secure fit •Unique cover design •Stays secure while underway or trailered •Low-profile prevents water from pooling on top surface •Includes threaded locking collar to retro fit existing pole lights •NOTE: 2-Pin Light Bases fit Frosted Globe: 5110 Series Anti-Glare: 5310 5320 5330 and 5340 Series LED Anti-Glare: 5530 and 5540 Series Bi-Color: NV6LC1 5092 and 5091 Series.