My first attempt at threading metal was to put the threads in the swivel plate of a jack. I already used my bench drill to drill the holes. It was some sort of steel and I had trouble starting the faucet with the T-handle until I remembered I had this set. After setting the cordless drill to medium torque and low speed, I was able to drill all 4 holes with no problem. Very happy with these drill and tap sets. Now I want my drill press to have speed control as it would allow me to drill a vertical hole and thread it in one step.