I went thought 2 rotary punches in just a few months. the Economy one the hand bent when I was trying to go though a double layer strap of only about 4mm thick. Ruined the work because the hole went though at a terrible angle. I bought another one that was suppose to be better quality and the rotating wheel separated and the tubes would keep falling out. Just recently I purchased the punch set from tandy and it works much better and is much easier then the rotary punches. I don't think I will every go back to a rotary again.