If you need to use the. guidelines to cite sources, there are two formats you can use. The author-date format is often used in the physical, natural, and social sciences, while the note-bibliography format is more common in the humanities (literature, history, and the arts).
The BBCOR one-piece bats are made of composite or metal and they are one solid piece from the barrel to the handle. The two-piece bats have separate barrels and handles. The two-piece bats usually have different materials, with a composite handle and a metal or composite barrel.
Today's bats are made from aluminum or composite. There are several different grades of aluminum. Lower price point bats are made with lower grade aluminum and are great for beginning players or recreational players. If you're playing at a more competitive level, you're probably going to want a bat made with a high performance alloy.