I use a Shimano ATBC007 (black nickel plated high-carbon steel) diagonal cutters for both coiled cable housing and the constant length stretchless stuff. Cuts like a charm. These are sold under the "Brutus - Black Nickel" line of pliers and cutters used for fishing and cutting leader wires. I haven't had much issue with having to re-spread the opening on housing after cutting. And the cutters still cut just great after a LOT of use.