A recip-saw blade may not have to work that hard in new construction, but on a remodeling site it undergoes a real torture test, cutting abrasive roofing, nail-embedded wood, and anything else that stands in the way.Many tool companies produce one or more blades designed for this kind of work. To see how the various choices stack up, I tested blades suitable for cutting nail-embedded wood and doing general demolition.Blades of this type usually have six teeth per inch (tpi), though some have fewer and others have variable spacing. All but two of the blades I tested were bimetal -...

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