Finis Bolster PaddlesDescription The Finis Bolster Paddles were developed in the USA, patented by a leading American swim coach. The paddle covers both the hand and forearm and effectively locks the wrist while swimming to encourage the user to develop a forearm dominated stroke, and can be used for all four strokes. Its unique design conforms more closely to the swimmers anatomy than any other paddle on the market when it comes to paddle blade, hand and forearm position