The Adjustable Tee system is made so you can use just one tee for your entire practice session whether you're a beginner or a professional. The Adjustable Tee slides up and down to the ideal height for driver, fairway woods or irons, with a tee cup that provides launch angles like a real tee. Its polymer material delivers exceptional durability, so you won’t keep breaking tees. Just push the Adjustable Tee through the holes in Fiberbuilt Grass strips and you’re set for practice through the entire bag. The tee system is great for indoor or outdoor practice on mats when you don't want to use the normal white rubber tees that are non-adjustable. Much more durable than wood or plastic tees, the Fiberbuilt Adjustable Tee Set is the perfect golf accessories gift for the hard to shop for golfer. A great tool to have in your bag at the driving range.