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Your cart is empty.Master Lock High Security Padlocks Three Keyed Alike Padlocks - Model # 6321NKA-3 LIFETIME GUARANTEE! Lock bumping a surprisingly simple method of breaking in through locked doors and padlocks - is undoubtedly the newest emerging threat to personal property security. And virtually all locks in use today are particularly vulnerable to bumping. Until now. BumpStopTM Advanced Cylinder Technology employs an innovative, patent pending design which utilizes a unique reverse rake tapered driver pin, high performance springs and tightly machined cylinder chambers. During a bump attempt, this design prevents the transfer of force from the bump key to the pins and therefore blocks rotation of the cylinder so that the lock remains locked. This is a set of 3 Keyed Alike professional series padlocks and is ideal for all outdoor applications when needing multiple locks that utilize ONLY one key. The same key opens all locks. Each lock comes with two keys, therefore you will receive a total of six keys with the purchase of this 3 pack. You can order up to eight locks keyed alike. This style lock is also available in a 2-pack and a 4-pack. To purchase visit our Amazon Store (click on our logo), or via the Master Lock link under this pages title. To reach any desired quantity order a combination of 2-packs, 3-packs, 4-packs. For quantities greater than eight please inquire and we can normally have them in a couple of days.
james l young
Reviewed in the United States on June 24, 2024
Had to hand file so they would fit easily but I still like them.
Robert from Alaska
Reviewed in the United States on November 5, 2024
I dont have the tools to test their bump-resistance, but these feel much more solid than my old locks on my storage cabinets. Well built, guarded shackle, heavy armor around the main body means that getting a bolt cutter around the shackle will be harder for any thief as well. Kind of pricy, but so much better seeming than the previous set by a different manufacturer.
avid shopper
Reviewed in the United States on April 4, 2024
This padlock looks sturdy and secure. It is heavy and looks difficult to break or jimmy.Can't speak for weatherproof ability yet and I have not had it that long but it looks impressive.
Lawrence Bufalino
Reviewed in the United States on August 12, 2023
Best thing about this lock is one, the anti bump feature and two is the protected steel loop. If you use it to lock a storage cage it makes it very difficult for anyone to get a pair of bolt cutters between the pillars of the cage door and the protection of the lock surrounding the steel loop. Exactly what I was looking for. Honestly it would be easier for someone to just cut through the cage instead of the lock.
Jimminnm
Reviewed in the United States on May 19, 2023
All came keyed a like. Good quality Master locks for vandalism resistant security on doors, shipping containers and the like!
Mark C
Reviewed in Canada on December 29, 2019
I bought these for a cargo trailer because I wanted robust, keyed alike locks that were difficult to cut and relatively weatherproof. Had read a review stating the lack of spring in the shackle mechanism made this model feel like the latch was unreliable when closing. As this is supposed to be a bump resistant lock, I attributed that characteristic to the anti bump feature. However, I have found that when closing the locks in subfreezing temperature (just below freezing), I can close the lock, return the key position to lock position and remove it, but still pull the lock open. On two different locks of the same model, I had to repeatedly open and close them several times before they stopped opening upon a good tug. WTF, Master? For this price you can't engineer a lock that closes reliably at -2 degrees celcius? I was dubious about Master after looking at a number of models, but took the plunge because the form factor of this model seemed right for my needs. Guess I should have spent a bit more on an Abus.
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