I know this sounds daft, but I cant think of anything else safe to do with it!
It came with a set of fancy knives I bought some years ago, frankly it scared the crap out of me and with (then) young kids in the house I hid it away. Found it recently in its case and I want rid of it. Its not something I would ever use.
Thing is, normally I would charity shop stuff like that but obviously cant, same with freecycle etc. I cant just chuck it away, not safe. And I dont feel happy putting it in the metal recycling at the tip as people have to sort through that stuff and it is like a razor blade.
Any other ideas?!