At Mybinding we are Challenge dealers and sell a large number of their cutters and other pieces of equipment each year. For that reason, we are proud to carry a massive selection of replacement blades for current and discontinued models of Challenge electric and Hydraulic cutters. Choose a knife for your Challenge 193, 193H, 2020, 230, 265F, 305, 305C, 305F, 305H, 305M (you get the point). We have blades for virtually any model that you can imagine. Just choose your particular model and make sure to double check the length and the number of holes. If you are having trouble figuring out which one is right for you (there are a lot of options) please give us a call and we will gladly help you out.