I bought this drill to drill four holes in a 1" EMT tube to install a weather station. Keep in mind that this is a very light tube with thin walls. So much. At hole number 3, the chisel was completely blunt and could not pierce the thin metal of the pipe. Had to buy another drill bit (different brand) to drill hole #4. I have a 10 year old set of drill bits of the same type and still in great condition.