Kestrel Performance Golf Tee - Plastic Golf Tees 2 3/4 inch & 3 1/4 Inch, Longer lasting, More distance, More fairways, Better Scores. Kestrel Performance Tee is the only tee that utilizes four scientific principles designed to produce a low friction golf tee that transfers energy from the club to the ball most efficiently: Comes in 2 sizes 2.75 inch and 3.25 inch legnths Independent testing by leading laboratories show that on average the our plastic golf tee produces more total distance and more carry than traditional cup tees. Increased durability. Our patented plastic golf tee formulation is built to last longer. USGA & RA RULE CONFORMING – Kestrel Performance Tees are tournament legal for any events using the USGA or R&A rules. Kestrel Performance Tess are used on the PGA and Senior PGA Tour How it works: It's 6 tiny prongs create low surface area contact with the ball, 83% less than cup tees. Giving you more distance and less spin. It's rounded tips allow the ball to “roll-over” the leading edge. It's smaller head diameter sits the ball higher in the “cup” reducing the forces needed to “lift” the ball out of the cup. Most importantly, the "performance" coating of the head reduces the friction between the ball and the tee by 90%, allowing a purer release of the golf ball. The science behind the technology. According to the laws of physics, a ball resting on top of a golf tee must overcome two sets of forces before it moves: The golf ball's mass must be lifted up out of the recessed cup and over the edge of the cup's rim, or alternatively the cups rim must be pushed down out of the way of the ball. The golf ball must overcome the inertial friction between its surface and that of the ball. We've done all the hard work so you can focus on hitting longer straighter drives…let's fly!