A balisong, or butterfly knife is a knife that originated in the Philippines. They were used before as utility knives, but now are used to perform tricks because of their two separate
What kind of knives can you legally carry in Pennsylvania? - pennlive.com
without a permit these are considered illegal to carry in most states . this is so stupid considering that I can open most of my knives just as fast or faster .
MAGNETIC Gravity Butterfly Knife!? (ABSOLUTELY INSANE) - YouTube
Butterfly knife - Wikipedia
Are Butterfly Knives Illegal? | Cool Material
GRAVITY KNIFE VS OTF VS BUTTERFLY VS AUTOMATIC - YouTube
What knife laws you need to know when choosing your "everywhere knife." - Knives Illustrated
Here are the knives that are legal, illegal to own in Pennsylvania - pennlive.com