The Unique ABS Thumb Turn Cylinder

Most thumb turn cylinders are open to attack by manipulation of the central cam.

On other cylinders, having a thumb turn version is like having the key on the inside, so if the cam is turned, the door can be opened.

The ABS thumb turn cylinder has a unique, patented design whereby the thumb turn knob is sprung loaded. That means you have to push first, before turning the thumb turn knob. This means that in its normal rest position it is like having the key out.

This means it is not vulnerable to attack and doesn't compromise either the convenience or safety aspects of having a thumb turn cylinder.