Barrier-free padlock / padlock

When we want to open the padlock,we often use one hand to hold the lock,the other to put the key into the keyhole.But it is difficult for people to use one hand to do it.This padlock is designed to help people who with single hand or inconvenient to use both hands to paly the lock more easily.
By making a gap in the side of the lock,it is more easily for people to find the keyhole .