have you used these?

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I got a stack of theses grinding blades at a yard sale.  https://www.kimballmidwest.com/Catal...3#selectedItemOH MY GOD THESE BLADES ARE AWESOME!!!]  My local welding store has never seen these before. Has anybody else used these? I hope I can get my boss to buy them, but they're really expensive.
Reply:This looks an awful lot like spam, but I will give you the benefit of the doubt. I've used most of those type of disks. I find them not to be worth the price simply because they wear too fast. Not a problem when you are spending somebody elses money, but when youare going through three, four, five $7 o $8 disks in a shift it needs to be closer evaluated to see if there is a less expensive way to grind.
Reply:Looks a lot like CGW's green wheel, or 3M's green corps wheels. Both nice for their antiloading properties. About twice as much as normal wheels, value depends on userwww.triarc.us