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Yes. It's a tradesman hack to buy a 115mm grinder (it's cheap), take off the guard and fit 125mm disks. People have been killed here recently by broken bits firing out. Cutting disks are so thin that a minor course correction can easily break them. Someone I know had a labourer use a grinder with a broken on off switch. One day the guy put it under his arm and plugged it in, and it cut through artery, vein and nerve. A year later and he is just starting part time work.