Combination locks are typically found on school lockers, bicycle chains and personal safes. For whatever reasons, there may come a time when you wish to re-set the combination for Master Lock lock box. If all else fails, you can always crack the lock with a good old-fashioned safe cracking trick. I would say break it open and get your keys out, they are harder to replace than the lockbox. Operating the Master Lock 5420D Universal Lock Box. Using a drill and a flashlight, you can find the combination to any Master Lock in four easy steps. Drill the holes. If your lock is attached to something, you will need to call a … There is a portable box or a mountable box that both operate under the same normal procedures: Punch in your 4 Digit code using any input from 0-9 including # and *, (12 total buttons to choose from). The Master Lock SafeSpace® Lock Boxes provide secure storage of keys or access cards in a convenient location for regular use. Instructions for the device are as follows: Open the safe's door and position device onto your wall. There's no way we could bypass the lock if the lock mechanism won't work. Then, write down whatever number you're at. If it's jammed up and you can't open it with the code you will most likely have to break it. Store your combination at www.masterlockvault.com . Then, check what number you're at, add 5 to that number, and write it down. Jammed MasterLock Key Box - Any advice? Learn to operate, set your own combination, and install the 5420D Universal Lock Box. Master Lock 5400D Select Access Key Storage Box with Set-Your-Own Combination Lock in Combination Padlocks. ... Super Heavy Wall Mounted Waterproof Key Storage Security Lock Box Reset-table Code, Suitable for Home, Factory, Decoration Company, Construction Site Key Storage and Management, Gift - 2 X Key Rings (Gray) 4.6 out of 5 stars 159. Master Lock SafeSpace® Spare Key Lock Boxes. Master Lock is among the top names in security and makes a wide range of both combination locks and key … While some styles might be locked with a key, many lock boxes require a combination to open. Master Lock also manufactures a wide range of lock boxes and safes. Resettable combination locks have a combination that is assigned by the owner of the lock. It is important, to know if you have a light duty, heavy duty or special duty lock. Rotate the dial to the right to the last number of the code. Ask the distributor or retailer to contact Master Lock for the Activation Code on your behalf using the Lock/Device ID which is engraved on the back of the lock and noted in the app under About This Lock as "Device". Lock boxes are designed to protect your valuables or personal information. Therefore, Master Lock does not have record of the combination that the owner set. To open combination locks without a code, start by pulling up on the dial and turning it clockwise until you hear the lock click. Mark the position of the screw holes with a pen/pencil. Master Lock 5408D … Next, set the dial to that number and turn it counterclockwise until you hear it click again. Bring the lock to a Master Lock distributor or retailer. Turn the dial to the left past the first number of the code to the second number. The lock cannot be reset unless it is in the open position. Rotate the dial three turns to the right to the first number of the code. Remove the lock from the wall. Hold the lock so the shackle is facing up. But sometimes a combination lock can be too secure. How to Open Master Locks. The order of your input does not matter so if 1-2-3-4 opens your lock box then so will 4-3-2-1, 1-3-2-4, etc. With a Drill. Use level to ensure the safe is vertical. How We Decode It / Bypass It Video of the Day. Master Lock is a popular manufacturer of combination locks that are opened using a turnable dial and a pre-selected numeral code. The number should line up with the notched arrow at the top of the lock.