Interested lock cylinder, that convinced me.

A lock cylinder with a corresponding screw for fastening and 5 keys. It is stable and the key in the lock and slide easily out again without overlapping at any point. Easy installation as with all cylinders I had so far in his hand.

Conclusion:
Super Ware. Any time.

Note:
If the key can be turned after installation difficult or with a lot of effort, it is usually at the door or mortise. For me, a degree had eaten there once purely in a component. With a small metal file and a drop of oil that was to bring back to normal.