The Super Slugger bat weight is the perfect strength building tool for any baseball or softball player. Using this tool will build your arm strength and over all hitting performance. Using this tool will allow you to swing faster and hit the baseball further. You can use this tool on your own at home or you can use it on deck, waiting to go up to the plate. The size of the super slugger makes it easy to carry around. They are small, but heavy enough, and super bright. They are coated with a rubber material to help stay gripped onto the bat while swinging. These bat weights are available in 4 different sizes: 9 ounce, 12 ounce, 16 ounce, 21 ounce. If you are wanting to increase your batting performance, these bat weights are the way to go!