Master Lock offers 6 of the most popular door lock manufacturers' cylinders. Master Lock's reference number is on top.
![Available Keyways](https://cdn.masterlock.com/cms/image/keying/doorkey_chart.gif)
Adapters available to accommodate OEM key-in-knob cylinders and keyways:
- Schlage® – Standard, Primus, Everest
- Assa® – 65611
- Medeco® – 20W2000, 20W