This Locking Collar is ONLY for YOLOtek products (Fits Gen1, Gen2 & Gen3), as it is custom fit for PowerStick-53" & PowerStick-20" - Attwood Light Armor Threaded - Only fits Attwood Light Armor threaded navigation light ports. Compare to your navigation light base and make sure it says LightArmor by Attwood.
Any questions, please call 800-488-5512