Shop for Baseball Mitts & Bats Accessories from Hayneedle.com! Prepare for spring training with the Franklin MLB 20 oz. Batting Weight. It adds weight to your bat, making your arms stronger and used to wielding heavier bats, so when you use a regular-weight bat, you ll have more power in your swing. It s made from cast iron with a non-slip polyurethane coating.About Franklin SportsIn 1946, brothers Irving and Sydney Franklin founded Franklin Sports in Brockton, MA. As the company grew, Franklin's headquarters moved to a larger facility in Stoughton, MA. What began as a business specializing in manufacturing leather sporting good items for the youth market has expanded successfully with the addition of distribution partners in Europe, Japan, Australia, Mexico, and Canada. As proof of Franklin's top-quality products, the Franklin batting glove is the official batting glove of Major League Baseball. From professional athletes to the youngest novices, Franklin meets the needs of all, with innovative products and exceptional value.