Razor-Back 4 lb. Sledge Hammer with 15 in. Fiberglass Handle 3111000 - The Home Depot
Martin Sprocket #S844SH-Sledge Hammer - 4 lb
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Amazon.com: 2 Pack 4 lb Small Sledge Hammer, 4 Pound Mini Sledge Hammer, Steel Head and 12 Inch Long Shock-Resistant Fiberglass Handle, Heavy Duty Stoning Hammer Club Hammer : Tools & Home Improvement