These twirl-it motor pigtail ornament spinners are a fun, unique way to add motion to your Christmas tree! Each pigtail 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 so 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. Set includes 3 spinners. It is recommended to only place one spinner per light string.