What is a Safe Deposit Lock?

Most modern safe deposit locks are actually two separate locks inside one housing that work together to control a single locking bolt.  The whole idea is to have a lock that requires two different keys before it can be unlocked.  Traditionally, a single key is used to control one side of all of the safe deposit locks in a bank.  This key is maintained by the "vault custodian," and is called the "Guard Key."   The guard key is always inserted into the lock plug that is the closest to the hinge on modern locks.  Once the guard key has been turned and left in the turned position, then the key that the renter of the box controls is inserted into the other plug and turned to unlock the box.  Naturally enough, the key that the renter controls is normally referred to as the "Renter's Key."  Only when both keys are inserted and turned can the box be opened.

One safe deposit lock with one nose but has renter key and guardian keys(master key)


 

This lock opened by using master key clockwised turned , then insert user key to open the safe successfully



YOSEC Zinc alloy single nose safe deposit box lock is widely used for strongroom vault door and fireproof vault door

This safe deposit lock can be replaced MOSLER  SAFE DEPOIST LOCK / BULLSEYE DEPOSIT LOCK /time-master safe deposit lock/Diebold safe deposit lock


U. L. Standard safe deposit lock

Replacement for S&G 4440L.H safe deposit lock
Six Renter & Five Guard Levers
Standard Guard Key is #4
Guard Matchwork is Available
The M-81K Lock has the Extended Bolt for B & C Rate Safes
Precision Left Hand Safe Deposit Lock P42-LH-750
These are brand new old stock, may have small imperfections or tarnishing.
Big nose/little nose. Renter nose diameter is .840", guard nose diameter is .672". Nose height is .50".
Lock body dimensions are: 1.78" high x 3.19" wide
Distance from center of one nose to center of the other nose is 1.39"
Comes with two renters keys and one #61 guard key 
Equivalent to Ilco A402100 Left Hand Safe Deposit Lock
Equivalent to S&G 4442

• Principles of safe deposit lock design
• Lock Handling
• Nomenclature
• Operation
• Non-changeable locks
• Single changeable locks
• Double-changeable locks
• Key blank selection and duplication
• Generating keys using space and depth keys
• Using a key machine to generate keys
• The "drill and pick" method
• Damage-free bypass techniques
• Pulling the nose
• Pulling the door
• Repair techniques

FLEXIBILITY

• Available in models for right-hand and left-hand doors.
• 1/2 inch height to accommodate standard safe deposit door thickness.
• Factory matchwork (production of new locks set to an existing guard key supplied by the customer).

 

SECURITY

• Pick-resistant lever defends advanced decoding techniques.
• Key-retaining for added security in daily operation.

 

DURABILITY

• Brass levers and plugs for long life and dependable operation.

 

WARRANTY

• One year from the date of shipment from manufacturer. 
  Download Warranty

 

KEY BLANKS

• Available in variety of options. Check with your dealer for details

Do you need this class? Test yourself with these questions:

1. On a two-nose lock mounted on a left-hand door, is the guard keyway to the left or right?
2. How could you determine exactly where to drill a hole for the "drill and pick"?
3. Which characteristics are vital when attempting to identify a safe deposit lock?
4. How can you tell a left-hand lock from a right-hand lock?
5. Do all safe deposit locks that use two keys have two separate keyways?

B440 series safe deposit lock with left hand opening

Replacement lock for safe deposit box with dual nose 

Guardian key for master and renter key for user with double security

User key and master key ( alike key for bank manager) is changeable

Customer logo can be printed, mounting holes are standard 

The B400 Series are all U.L. Listed with the exception of the B445 1-1/2 Nose Self Service locks
This lock is widely used for strong room door vault or bank cabinets or safe deposit box