I saw some reviews that made me skeptical. I was hesitant to buy the whole set so I just bought what I needed at the time. It was a 1/2" x 13 tap. I drilled and cut 50 holes in 3/8" stock (A36 carbon steel) and the chisel still works. You shouldn't have any problems with this bit if you use it properly. When cutting/tapping, keep it lubricated and do not use excessive force. I love the product and plan to buy the whole set.