Arrived yesterday. Today I hit the third .196 hole in mild steel before it burst. The tailor broke the handle. The bigger ones could have been better but this one sucked.
Beveling a hole in a pipe can be critical. These tools make this task easier. Note: the little one is a bit picky about which way the blade is pointing.
The screw that holds the blade is constantly unscrewed. You should stop and tighten every five to ten holes. Replacement blades are $16 each and no replacement blades are included! This is a disposable tool at best.