O.KEY/door knob / door knob

There are many situations when you find difficulties in locating and opening a door key.
whether the surrounding is too dark, You can only use hand since your hand is occupied ,
or maybe you are visually disabled person.
O.KEY is a door knob with a wide opening in the center that ease the user inserting the key vertically
into the hole. You just need to drag the key all the way to center and turn it like usual to open the door.