Everything You Need to Know About Master Pins in Locks
Any property that has a master key will have locks with master pins installed. In saying that, there seems to be a bit of uncertainty about what that entails. So before we go any further, let’s clear up a bit of confusion.
Also known as wafers, master pins are installed in a standard lock to allow for the use of a master key. Inside your lock there are stacks with multiple key pins – in order to get both master and standard keys working without getting in each other’s way, the master pins are fitted above the standard key pins. Adding a master pin means adding more shear lines to a lock, giving users more options to open it.
Now, this is the part that often seems to confuse people. While master keys can work in all locks with master pins installed, they are not necessarily what you would be looking for if you wanted all locks to be opened by a single key. Keying all locks alike tends to be the most common procedure. In this case, the exact same bottom pins are placed into each lock cylinder, enabling you to use a single key to operate all locks – basically, no master pins or master keys are required when you key all locks alike.
You can probably guess why locksmiths don’t recommend master pins for all doors. With more chambers installed in a lock come more unlocking options; with more unlocking options, it becomes easier to the lock open. Even someone with a limited knowledge of locks and keys can learn to circumvent a lock with master pins in it because of the way the chambers are fitted inside. If you are considering getting a master key for your property, we would recommend talking to a locksmith first and investigating your options further.