Dangerous garbage, I want my money back. I bought 2 of these bits and the upper bearing housing on both of them burned out after about an hour of use. I want my money back. I thought the first one that threw pieces of metal 360 degrees around might be an accident but the second one also exploded, I want my money back. Dangerous, luckily I wasn't hurt, I want my money back. DID I MENTION THAT IT IS DANGEROUS AND I WANT MY MONEY BACK?