Unable to get a full 180 degree rotation with your Step Change Key? You may need a Control Key!
Control Keys facilitate the removal of the figure 8-shaped IC Core from your door hardware.
After successfully removing the core, you will then be able to achieve the required 180-degree rotation using the Step Change Key.
Follow the below process:
Here's a few videos of different lock types that may require rekeying with a Control Key:
How to Use a Control Key:
Emergency Exit Devices with Rim Cylinders:
Leversets:
Padlocks: