3 ms·There are plenty of locks that do not use keys, e.g. a keyless deadbolt.by amalcon 8y agoThere are plenty of locks that do not use keys, e.g. a keyless deadbolt.JdeBP 8y agoNo. The key that unlocks a "keyless" deadbolt is the code that one types in.amalcon 8y agoThat type exists, yes. There is also the variety that is simply impossible to unlock from one side.