This twirl-it motor pigtail spinner is a fun, unique way to add motion to your Christmas tree! The pigtail ornament spinner easily plugs into any incandescent 35, 50, or 100 light set (Will NOT work on LED light strings). To hang and twirl your favorite Christmas tree ornament, take off a light bulb from your light set and the Twirl-It can be plugged inside it. Place any ornament on the hook of the Twirl-It for a spinning motion. When the lights are turned on, the Twirl-It spins the attached ornament. It is recommended to only place one spinner per light string.