Markwort Power Fins

Build swing strength, increase bat speed, and develop stronger wrists. The Power Fins allow you to work against air resistance instead of using weights and provide resistance throughout the entire swing. Batting donuts have been found to do more harm than good as they upset the natural swing process and the weight distribution of a bat. Your swing mechanics are not altered with the Power Fins.

Simple slip the fins over the barrel of the bat and swing! One size fits all baseball and softball bats at all levels of play. Assembly instructions included. Weighs 14 oz.