Keying Option Explanation
If you are ordering several locks which all open with their own key, then order 'Keyed to Differ'. Each lock will be supplied with 2 keys.
If you are ordering several locks which all open with the same key, then order 'Keyed Alike'. Your order will be supplied with 2 keys. Additional keys can be ordered.
If you already have ICS locks and would like more locks which can be opened with the same key, then order 'Keyed to Existing Lock'. This order will not be supplied with any keys, but keys can be ordered separately.
KEYS AND LOCKS MADE TO AN EXISTING KEY CODE MUST BEGIN WITH THE PREFIX 015EI. CODES BEGINNING WITH A DIFFERENT PREFIX CANNOT BE CUT BY US.
How to measure your cylinder. The size is expressed as two numbers equivalent to Offset 1 (External Side) and Offset 2 (Internal Side) below, the turn normally being on the interior side: