Wow, i can`t say enough good things about these replacement cutters! The quality is top-notch, which is what I expect in an Industrial and Scientific tool.They are durable and work just as well as the original cutters. The only downside is that they are sold in a pack of just 6, so if you need more than that, you'll need to purchase multiple packs. Overall, I highly recommend these cutters for any professional in need of reliable and high-quality cutting tools..