Combination locks are helpful in a range of things, including lockers and home security. It might be upsetting not to be able to access your possessions if you forget the combination.

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How to Open a Master Combination Lock?
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Combination locks are helpful in a range of things, including lockers and home security. It
might be upsetting not to be able to access your possessions if you forget the combination.
If you don’t want to break the lockdown, there are a few additional options. These steps
will allow you to unlock a combination lock without a password, but only on your lock.
You’ve probably unlocked a Master combination lock if you’ve ever interacted with a
school locker. It’s a well-known combination lock with a conventional method of
operation. You can also use combination locks to secure storage sheds or a garage. You
can open a master combination lock, provided you know how to spin the dial and how
many times to crank it. You can also contact door lock repair for assistance.
How to open a Master Combination Lock?
Parts of a Master Combination Lock
There are three main parts to a lock. The U-shaped portion that ties it to an object is
called the shackle. The dial is the rotating section with the digits. The rest of the lock is
made up of the body. The locking mechanism is usually on the bottom left of the shackle if
you keep the lock with the shackle on the upper side and the dial towards you.
Using the Serial Number
Make a note of the number stamped on your lock. A serial number may or may not
be present on some locks.
Request the supplier to contact the lock’s maker after verifying your ownership and
supply the combination.
The retailer may charge you for this service.
Check the company’s website to see if this service is available.
You may be asked to provide proof of ownership, such as a signed document
attesting to your possession.
If the combination lock is from a school or company, the administration may list
combinations based on serial numbers.
Make a note of the serial number.
If the lock is tied to something, such as a locker, you’ll need to show confirmation
that you have permission to access the locker’s contents.
Cracking the Combination
You’ll need to carefully pull up on the shackle to find a lock combination.
It will be impossible to move the dial if there is too much pressure. If you use too
little, the dial will move quickly.

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Pull the shackle up carefully and hold it in place. Turn the dial slowly, paying close
attention until the lock clicks.
Start with a lot of pressure, then gradually ease off as you rotate it around until you
only run against resistance in one spot.
You’re tugging too hard if the dial catches every few digits. You’re not pushing hard
enough if it never catches. It should only catch in one spot, resulting in a click.
If the click occurs between two digits on the dial, adjust it to the higher digit.
To that value, add five and note it down. The first number in the combo is this one.
Before you reset the combination lock, it’s a good idea to rotate the dial a few
times.
Turn the dial slowly while keeping slight pressure on the shackles. Before
approaching the second digit, you need to go around the mechanism again.
As you turn the key, the lock will knock and catch.
The lock will eventually reach a point where it will be difficult to turn. The point
where it stops is the second number. Note down the number.
Testing every potential combination is one approach to determining the third digit.
Set the first two numbers as if you’re about to unlock the door. Then carefully move
the dial clockwise to test every potential number.
Toggle one number, then turn another. Continue the procedure until the lock
unlocks.
Shimming the Lock
Making the Shim
To successfully apply a shim, you must deal with the location where the shackle
latches.
You may make your shim by chopping up a Coke can.
Cut off the head and the base of the can with scissors.
You will be left with a single sheet of aluminum.
Turn the metal horizontally so that you’re cutting the shorter side. You will make the
shim from this piece.
Cut a strip slightly wider than one inch.
If any of the margins are ragged, you should trim them.
Cut two bends from the base of the little metal strip, forming the letter U by holding
it horizontally.
In the center of your strip, place the U.
Make sure you don’t go all the way to the top.
The end product should be a metal sheet that resembles the letter M but with the
center of the M bent rather than pointed. This is going to be the shim.
Using the Shim to Open the Lock
Lower the top of the metal by about an eighth of an inch. Then bend the sides of the
metal sheet upward around the top.
By folding the sides, you may have a shim handle that won’t cut your hand with a
pointed end.

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The shim’s U should be facing down.
Put the shim around the exterior of the shaft gently first, so it molds to the contour
of the shaft.
When you’ve achieved the desired form, rotate the shim so that the U is inside the
shackle and your handle is on the exterior.
Keep the shackle in place with your finger by pressing it up as far as it will go. Slowly
slide the shim into the gap between the shackle and the lock itself with your other
hand.
Do not rush or force it.
Stop when you’ve pushed it in as far as it’ll go.
Now, press the shim. Squeeze the shackle down with one hand, then draw it up with
the other. The lock should unlatch.