The finger trap is a simple puzzle that traps the victim's fingers (often the index fingers) in both ends of a small, woven bamboo cylinder. The initial reaction of the victim is to pull the fingers outward, but this only tightens the trap more.
The solution to escaping the trap is to push the ends inward toward the middle, which enlarges the openings and frees the fingers, before slowly twisting them out of the trap so as not to trigger the tightening reflex again. A second form of escape is to push one's fingers together and then grab the ends of the trap with one's middle fingers and thumbs. The fingers can then easily be pulled out.