I have 2 Major A100 KEE-BLOK for Knobs for sale. They are like new and have only been used a few times. These locks can be used to cover a door knob so a key cannot be inserted without taking the device off first.
They can be used where a resident has vacated and you do not have the time to immediately do a lock change. There are other creative enforcement uses as well.
These are keyed alike. Buy one or both.
Asking $35 each.
Here is a link to them on Amazon:
https://www.amazon.com/Major-A100-KEE-BLOK-for-Knobs/dp/B0056RQRXQ
Call or email if interested.
Jeff Sturtecky
jeffs@rentrockford.net
847-514-0775