I have worked with wood for 50 years. I have a project that requires 2" holes in 1/2" white oak. Based on the price of this bit and customer reviews, I expected reasonable durability. After 10 holes, he lost his cutting ability and started burning wood. Also, I left hole #1 with a lip as I drilled on both sides (yes, I used a through pilot hole). The play just didn't get to the end. I then turned to one of the beats from the Warrior 16-bit set, which cost me about $2 a beat. in a wooden box. It cut perfectly and left a clean hole everywhere. Yes, both are made in China. You don't always get what you pay for.