Examples of this type of thing are almost endless for those that have worked in the trades. Beater tools have a place and them cheap chisels might be the most abused tool of all.Let me give you an example. The fully burdened rate for one of our carpenters is a little over $90/hr. Last month one was replacing a threshold at one of our outlying buildings. A lump in the concrete was interfering with the installation. He didn't have a cold chisel with him but he had a $15 wood chisel which he abused chipping concrete. He saved an hour long drive for a cold chisel by abusing a $15 wood chisel. Net gain $75 and the chisel was still sharpenable.