Breaking free from zip ties could appear impossible, but actually, it is possible once the right techniques are used. Whether in an emergency situation or just as a security restraint, knowledge of how one breaks out from zip ties can be a good skill learned. Here are 10 ways to help you break free:
Breaking the tie with force: Most nylon zip ties have a tensile strength of 50-175 pounds. Thus, any quick, abrupt force will break it. Place your wrists together, raise them above your head, and forcefully strike down on your hip bone while pulling outward; this will break the tie.
Loosening by use of friction: Friction tends to heat up, which can weaken the plastic. By rubbing the tie briskly on a coarse surface such as concrete or stone will soften it enough to break easily.
Shim technique: A thin piece of metal or plastic may be slid between the ratcheting mechanism and strap to dislodge the lock. A bobby pin serves nicely for this, or a small flat head screwdriver.
Biting the tie: If no tools are available, then the teeth will suffice. Biting through the thin side of the tie should weaken the strap, especially for standard nylon ties that are 4-6 mm thick.
Twisting to weaken: Continuous twisting will weaken the plastic. Most zip ties are built to resist being pulled and not rotational force. Rotating the tie until it feels weaker will eventually cause it to snap.
Using a cutting tool: If tools are available, then scissors or a knife could prove very effective in quickly cutting a tie. Many multi-tools feature small blades that are perfect for this, and even the most heavy-duty ties can be cut with ease using one of these.
Tension exploitation: If the zip tie isn't tightly fastened, you might be able to get a slim tool or key into the gap between your skin and the tie and push the locking tab open.
Jiggling method: If the zip tie is not fully tightened, then you can get out of it by wiggling your wrists. By gradually increasing the movement between your skin and the tie, over time, the grip loosens.
Freedom from multiple ties: In some situations, there are multiple ties on wrists and ankles. It's usually easier to start with the ankles because leg movements are able to generate more force. Once you free your legs, apply the above techniques on the restraints of the wrists.
Professional use of tools: Many tools, such as zip tie cutters, are designed specifically for the safe release of cable ties. This is ideal for planned situations that have utilized zip ties for temporary reasons, such as construction or wiring.
To continue improving one's techniques and to be better prepared, refer to 10 Ways Teaching You How to Get Out of Zip Ties.