This item has been signed by NY Yankees Legend, Tino Martinez, in blue felt pen. The bat was custom designed by BG Entertainment and produced in cooperation with Cooperstown Bat Company. It is a limited release with only 10 bats produced. Each bat has been individually numbered 1 through 10 and comes with a BG entertainment exclusive tamper proof decal. This item has been authenticated by JSA and comes with a tamper proof hologram decal, a JSA cert card, and is guaranteed 100% authentic.