How do I know what kind of key I have?

Question

In most cases the key number will be stamped on the front of the lock next to where the key enters. In some cases the number may also be stamped on the original key.

How do I identify a key type?

Most lock manufacturers use a distinctive bow design to identify their keys. First try to locate one that matches yours. Also look to see if your keys has a name or any numbers or letters on them. Letter/Number combinations such as SC1, KW1, Y1 etc.

How do I know what kind of house key I have?

Look at the large end of the key (also called the bow). If the bow has straight sides and a triangle-shaped top (like a house), you probably have a KW1 keyway. If the key is diamond-shaped (narrower at the top and bottom and wide in the middle), you probably have a SC1 keyway.

What do numbers on keys mean?

The first is what is known as a bitting code or direct code. The numbers relate to the cuts or depths on the key that allow a lock to open. These are usually found on sets of door locks that can be purchased at a hardware store or Big Box Home improvement store but sometimes other locksmiths will stamp them on the key.

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