Purchased specifically for chain link hog rings which it is not really designed for and didn't function for that purpose so returned. Just wanted to note that they are very limited on movement for a channel type plier. For each setting will only open about half inch from set point. This is probably not relevant when using as a pump plier but why didn't work for me. Have used other brands and never encountered that issue. They are definately high quality and comfortable. Having said that I subsequently purchased the Irwins for $20, they have less play and can close without pushing the button, cant recall if the Knipex does.