Both tools, pldset and netset, are used to configure the AMD.
The “suid” has been added for these tools to allow non-root users to use
If in your case only root user is going to use the tools you could
safely remove “suid” for both “tools”.
645 doesn't really make sense...
I would sooner say 750 or 550. If you are disabling the SUID bit, it makes no sense to allow everyone execute as only root would be able to effective use the tools.