I dissect antique pianos for wood and I must dissect harps. These are large pieces of gray iron, 200-300 pounds each. Hard as stone, up to an inch thick in places. I ground them and it took forever. Bimetallic blades were also very slow and short-lived. Broke down and ordered one of those Diablo Blades and WOW! They literally cut through iron like a piece of soft pine! I was able to break two harps in about 30 minutes with one blade and a 60V battery on my saber saw. With a mill it would take me two days. And best of all: the blade is still sharp! I can definitely recommend them and will definitely buy more of them. I have several Freud cutters, forstner cutters and saw blades and will be buying more products of this type as they come out - you can't beat the quality, value and price!
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