Sandpaper to file down hamster nails

[Sloth30]

Hi all!

Recently i notice my hamster's nails getting longer and I have read that letting my hamster run in a small box lined with sandpaper can trim it down.

I would like to ask what grit of sandpaper should I use? I dun wanna hurt my hamster's paws so i need some advice. Is a 240 grit sandpaper okay?

[Sloth30]

Please ignore this thread, due to problems in internet connection, I accidentally posted 2 threads. So sorry!