However, unlike the BBCOR bats, which must have a 3-length-to-weight ratio, USABat will not have a drop weight limit. Rather of necessitating the use of wood bats, which frequently have a length-to-weight ratio of 8 at their lightest, younger players will be able to utilize bats manufactured of light-weight, highly developed materials. Drop weight is the difference between the length and weight of the bat; for example, a 30 inch long bat with a drop weight of 10 will weigh 20 ounces. The larger the drop weight, the lighter the bat will be. Keep in mind that only high school and college baseball bats are regulated, and they must have a drop of no more than -3. The larger the drop weight, the lighter the bat will be. Keep in mind that only high school and college baseball bats are regulated, and they must have a drop of no more than -3.