HulkPrime

I have heard that the degradeable rewards from Fist of Guthix last up to 5 hours of combat. Can anybody confirm this? I would like to know before buying any.

I'm curious as to how they work before I trade any of them, if you carry them in your inventory while mining, will anything you mine go straight into the bag? Also, is it possible to carry more than 1 of them in your inventory?