I used to order these for my company because I thought they were good quality and had good customer service and they were the only 1-1/ 2 inch bits I could find. But after four of them sheared off the drive side after a week of use, I was sure they either got a bad batch of steel or were cheaper. What would be wrong. So bad if Milwalkie was even interested in fixing a potential problem with their production. In short, save time and money, buy more expensive wooden owls or lenox bits, I won't buy anything like that again.