
Lock opener, attached to doors locking knob
There are two different types of locking knobs. The rhomboid locking knob is attached to the locking knob with two screws; the arm length is 9 cm.
The flat locking knob is attached to the locking knob with one screw; arm length is 9 cm.
Users comments
The locking knob is an important complement to electric door openers and is important to have in the event of a power outage.
The user chose to position the safety lock at the bottom rather than at the top.
Purchased from
In Sweden for example Swereco, swereco.se (last checked April 2020)
Paid for by
The user
Related tips

Enables a person with disabilities to unlock a door by pushing a button. 2005