Get a 4 pound one with a fiberglass handle. Available for about $20 eg from Lowes:
http://www.lowes.com/ProductDisplay?partNumber=91049-355-91049&langId=-1&storeId=10151&productId=1209885&catalogId=10051&cmRelshp=sim&rel=nofollow&cId=PDIO1 .
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