by NKT » 11 Sep 2005 17:55
The first question to ask is, are the two bits of the key the same size, and are they in a direct line? Next, are the bittings equidistant?
If the bittings are in a straight line, one side is a little larger than the other, and the bittings are equidistant, it is a common safe lock, normally one with 7 to 9 levers in it. They are common on small key safes right up to big safes, but rarely have anti-pick protection.
If the bittings are not equidistant, you might have two seperate rows of levers on a double bolt, and the two have to be moved at the same time for the bolt to move. These are normally 2* 7 levers, and are often very nasty inside, with things like spring-loaded levers, anti-picks, non-circular lever holes, etc. Used on bank vaults, etc. and I saw a lot on my recent trip to Holland. If the key isn't straight, you certainly have two separately bitted lever packs inside.
If you are just looking at the keyhole, some locks have a non-straight keyhole, and the key goes in at one side, and out the other after turning, and vice-versa. These are just like a normal single bitted key, and have various numbers of levers.
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