Trident is one of the jailbreak tools for 32 bit devices running iOS 9.3.4, the Kernel exploits used in this jailbreak were patched in iOS 9.3.5. The Pangu Team actually helped on the development of this tool. It is important to note that not all devices are covered so we advise you watch the video below.

You can download the Trident iPA from here, please note I do not have a device I can use this on so I am unable to personally provide any instructions or support.