Please note that the one at WalMart is the cheaper made version, Cal Duster company makes a good one with a larger mop head and a retail version with a mop head half the size of the large one. The better one always comes with a wood handle for some reason, if it has a plastic handle it is the cheap one. I have both but I will only buy the better one, it does a better job of removing light dust and lasts longer (not saying the WalMart version will not work, it does) I buy the larger, better one online at Summit Racing for 15 or 16 bucks.
