If you think a baseball bat is a pretty simple thing, well, you're out in left field. Making a bat means balancing things like weight and thickness. The material it's made of can make a difference. Metal bats hit the ball faster however the pros use wood bats because of league regulations - and even the type of wood might impact the score. Barry Bonds cracked a home run record in 2001 with a wood bat like this - one made of maple instead of the usual white ash. They can never tell, just by looking at it, that a chunk of maple has what it takes to make a good bat, so they weight it to make sure the wood is really as thick and heavy as it appears.

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