These are novelty prank golf tees made of durable plastic, with a standard size that fits most golf clubs just like regular tees, so they look completely normal at first glance. When the golfer hits the ball, the tee will produce a loud, surprising bang that creates an unforgettable, hilarious reaction from the person being pranked. They are safe and easy to use, suitable for casual golf outings, golf tournaments with friends, bachelor parties or any social golf events. It is a perfect funny gag for golf lovers to add more fun to their golf time.