Will Costco allow you to walk in with an old, obviously abused and broken wrench, replace it for free right then and there without hesitation or documentation all while apologizing that the tool failed? It’s hard to beat how much Sears stands behind the Craftsman hand tool line. Costco/Harbor Freight/etc are great if you want a cheap set of tools. If you want a complete set of tools that you will use for decades, will stay complete and can get replaced for free as quickly as you can drive to Sears, buy Craftsman 🙂