When you think of Evil you think of the highest performing products, we continue that heritage with our latest softball bat offering, the Evil BamBoom. Hybrid Core Technology fuses a Bamboo Core with a Maple Barrel shell to create a High performance and Extremely durable bat. First we take a Asian bamboo handle a material that is tougher to break than maple or ash but lighter than ceder with a Yield strength of 53000 psi and fuse it with a maple barrel to create a superior hitting surface with unmatched durability. Also we included a tapered handle for superior grip. These bats swing extremely balanced. ASA approved with Stamp. Procup end design 29 oz 34 inch.