You have to grind a new edge with a grinder or coarse stone.
but, like tom asked, why would you do this. Doing so would make it a dagger, which is illegal in most jurisdictions. The thing already looks like a switchblade.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.