16oz. Original ProCut™ Strap-On Model Swing Weights $34.95 + $6.00 Shipping and Handling Strap-On Counter Weight For beginners to 12 yrs. old - We recommend practice swings so the hitters feel the hands snap the bat threw the hitting zone. Some players use it in the on deck circle. Advanced Players 13 yrs. old to Pro - The 16oz.is perfect to loosen up and to hit off the tee. Very popular with high school, college, and the pro's. The weight guides the hands fundamentally, allowing the hitter total control of the barrel while swinging. Some coaches use it in side-toss and short-toss drills with their players to help them stop them from casting their arms and hands during their swings. Item # 65L79V