TUF-LINE is incredibly strong and very small diameter. DO NOT EVER attempt to break it with hands or cut through it with your teeth. You will lose, perhaps be wounded and maybe require some dental work. A good pair of scissors or a knife is all that’s necessary.
On another note, do not ever wind TUF-LINE line around fingers, hands or arms while fishing, attempting to land a fish, or freeing a snag. For freeing snags, place a couple wraps of line around your reel, point the rod straight at the snag and holding the reel frame, pull straight away.