Been looking at a few different types a metals latley and have come to the conclusion that mowing blades that are available could be made alot stronger and made for lower maintanence. A tungsten cobalt mix would make an excellant cutting blade. Why do MFGs persist in making "mid Qaulity" blades that cost a fortune??? I saw a thread a while back that was posted by a guy called blademaker and there was alot of good ideas put together on that thread. Like replacable cutting tips etc.etc I know a tungsten cobalt mix would be expencive but if I can get three or four time more wear out of them without sharpening I'm sold. I just don't understand why MFGs don't utilize these stronger metals. I was talking to a guy the other day that told me light bulb MFGs have had the ability to make light bulbs last for 20 years but have patented the idea and will not bring em out on to the market.(greedy buggers) I just makes me think if where sort of having the wool pulled over our eyes???