I have a few EREM577E sidecutters, which are probably 20+ years old, and had seen some occasional abuse and gross overloads, but also normal wear as these were second hand and ex-factory use, and were therefore a bit blunt.
Just over a year ago I bought a stereo microscope, and with it I could see really well how blunt my Erem pliers had become over all those years.
So I spent about half an hour to resharpen them by hand on a simple whetstone, which was pretty easy because these are flush cutters and therefore flat on the outside.
I also de burred them my making a bevel with a 800 grit whetstone, which is maybe 50 um with. My Erem pliers are now very close to new quality.
According to
https://docs.rs-online.com/bb08/0900766b80eb4d3c.pdf Erem also has a re sharpening service.
An unexpected but very handy feature is removal of wood splinters from your skin. You can cut through the upper layer of your skin (which has no nerves) just deep enough to grab the upper part of a splinter and pull it out.
Also:
Probably been said before, but worth repeating:
Always make sure you have a set of cheap or other more robust side cutters right next to your precision cutters to prevent temptations of abusing the high quality Erems for stuff they are not designed for.