It designates the Length to Weight difference - i.e. if a bat's length is 34 in and is a -5 bat, then its weight is 29 (ounces)
It is the difference of the height and weight of the bat.
if you have a 33 inch bat and its a drop 3 it would weight 30 ounces its the ratio between the length and the weight
Chat with our AI personalities
the one with the most drop is easier to swing but heivier bats may hit he ball further