-The upper part of the tee is extended, allowing it to swivel 360 degrees in any direction without any stress. This results in minimal resistance at impact, allowing for a better swing through of the head, which in turn leads to increased distance. -The "swivel function" keeps the base (bottom) of the tee in place, making it difficult to lose the tee. The tee won't fly away, so you don't have to go through the trouble of searching for it after your tee shot. -Length: 29mm , 34mm , 39mm , 49mm