ESSENTIAL & AFFORDABLE: Ideal for coaches and players who only need one bat donut for daily drills, no need to spend extra on a set of two; Includes one standard size 16 oz bat weight that easily fits in any backpack or gear bag; Available in 5 colors INCREASE SWING SPEED: Warm up pre-game or on-deck with 16 oz added weight to swing harder and faster while batting BUILD STRENGTH: Can help hitters develop more power behind their swing; No need to carry a heavy bat just to warm up, simply add or remove weight to your bat as needed BASEBALL & SOFTBALL: Great for players of all leagues and skill levels, including BBCOR, USSSA, USA, USA Softball; Fits all standard bat sizes with a barrel size of 2 1/4, 2 5/8, and 2 3/4 inches NON-SLIP GRIP: Made from durable steel and coated with PVC for secure use on metal or wood baseball or softball bats; Won't scratch or damage your bat during practice