3uTools V2.20 is released with many new features, it also supports latest @coolstars Electra jailbreak for iOS11- iOS 11.1.2 devices. Check how to.

In case you want to uninstall this jailbreak, we are going to show you how to remove Electra jailbreak (Version for 1.0-1.02) from iPhone, iPad easily.

Preparation:
1.Download delectra file (By KirovAir on GitHub )
2. WinSCP and PuTTY tool

Step1: Connect your iOS device to PC via SSH. 
Don't change the file protocol. 
The host name will be your phone's IP, 
The generic Username is root, Password is alpine.
Remember to change port as 22.

Connect, accept the options that come up.

Step2: After it is connected, go to / root directory. Unzip the file you just downloaded, then you’ll find a file named unjailbreak.sh, put this file under /electra directory.

Step3: Make sure the transfer is done and close WinSCP.

Step4: Open PuTTY. Same situation, Host name is your phone's IP, port stays the same, connection type is SSH.

PieTTY Security Alert should be here after connecting, click "Yes"

Step5: Then a command box will ask you for your username and password. it will be like we said before, root and alpine. once it does that, type in bash ./unjailbreak.sh"

Press enter, then leave it alone. If all goes well, your phone will reboot with Cydia gone. Feel free to delete Electra off your springboard.