What is the name of the device that allows the door to be opened to one side only?

If you look at the bank door, you can only open it in one direction.

You don't necessarily want a complex form like a bank, but what's the name of the device that allows you to open the door to one side only?

510 2017-03-11 Gentleman

popular What is the nationality of Minnie?

popular Can I listen to music with Bluetooth earphones on the plane?

popular How can I connect to watch a video on my phone on TV?

popular How can I resolve TLS security configuration errors?

popular How do I recycle and recycle foil like cooking foil?

Same Tag Would a pad be good for the living room? Would Maru be good?

Same Tag I heard that using a carpet reduces dust, is it true?

Same Tag What is the appropriate size for a one-room bed?

Same Tag How much will it cost to make a production light?

Same Tag How much would it cost to change the light to an LED in a 33-pyeong apartment?

Same Time I can't play Overwatch. What's wrong?

Same Time What is the name of the device that allows the door to be opened to one side only?

Same Time I forgot my bicycle password, how can I solve it?