Please note the External Key Overide Option is not available on the 31-31 size cylinder.
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 3 keys.
If you are ordering several locks which all open with the same key, then order 'Keyed Alike'. Your order will be supplied with 3 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 006EN. CODES BEGINNING WITH A DIFFERENT PREFIX CANNOT BE CUT BY US.
To measure your cylinder: