These blades are sharp! They're also very effective at filleting catfish. The longer blades allow me to cut through the entire width of the fish without having to make adjustments. It's reduced my filleting time down to about a 3rd of what it used to be with the original blades, though some of that is also due to my improved skills. I think these blades have made me better and faster at it now. I've finally been able to fillet an entire cat with 4 swipes/passes, like many of the "Bubba" youtubers.