Hardware

Here's a good video underlining the importance of using drop forged wire clips as opposed to malleable. It also teach the right way to install a wire clip.

The lesson here: Don't risk the safety of your family with some backyard zipline re-sellers who tell you you can use a 1/4" cable with malleable wire clips for your zipline. As a professional zipline designer with over 14 years of experience, I beg you, PLEASE, DO NOT USE MALLEABLE WIRE CLIPS ON YOUR ZIP LINE!