I usually carry around my multi tool or a fold-able knife in my pocket, since in comes in handy in my field of work. I believe my foldable knife would be called a single hand manual release and my multi tool is just a Swiss Army tool. I've recently became concerned about whether or not it is legal. Would they be classified as weapons in Canada? The blades are about 4 inches long.
Furthermore, I am not a minor if that makes a difference.
A multi tool is not a prohibited weapon so it is not illegal to carry.
Prohibited weapon as defined by the Criminal Code
"prohibited weapon" means
(a) a knife that has a blade that opens automatically by gravity or centrifugal force or by hand pressure applied to a button, spring or other device in or attached to the handle of the knife, or
(b) any weapon, other than a firearm, that is prescribed to be a prohibited weapon;
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