Keyless Locks are locks that use electronic controls (instead of a traditional mechanical key) to move the mechanism that locks and unlocks doors. Pros:
+ No need for a traditional key (no traditional key to carry, that can brake, or be lost).
+ Code may be shared with multiple person (no need to duplicate many keys).
+ Code may be change in few moments (it is like having a new key). Cons:
- Someone may see you punching the code.
- Code needs changing from time to time (