If your top nut looks like this one, like someone carved out the slots with a butter knife or an axe, then please come and see us for a custom made bone top nut.BONE improves tone and sustain, we also use actual gauged nut slot files to your exact string gauge.Or even a hardened plastic pre cut replacement is ok if you only have a cheap guitar, its an easier and cheaper option than bone.Nut slots have so much to do with your playability and sound.Don't put up with a crap one. It's an easy fix.