The newly printed box undergoes drop test from about 1.5 meter high continuous for 5 times, the box starts to get deformed.

The destructive test to show the rigidity of our plastic key holder clip ZZK179. 

1. Clip the plastic part with the key ring
2. Turn the ring and the plastic part in opposite direction to create the destructive force.
3. The clip did not break away instead it kept tight until the plastic itself is being torn away.
4. The clip is still locked inside the hole

We have developed a slow retractor reel and please have a look!