🔐 Lock It Down: Your Security, Our Priority!
The Master Lock Four High Security Pro Series Padlocks (6321NKA-4) offer unparalleled protection with BumpStop Technology, designed for commercial and industrial applications. Each padlock features a weather-resistant cover, solid iron shackle, and a dual ball bearing locking mechanism, ensuring maximum security against physical attacks. With a limited lifetime warranty and customizable locking options, these padlocks are the ultimate choice for safeguarding your assets.
| Brand | Master Lock |
| Special Feature | Key Lock |
| Lock Type | Key Lock |
| Item dimensions L x W x H | 4 x 7 x 4 inches |
| Material | Steel |
| Recommended Uses For Product | Security |
| Style | Modern |
| Color | Black |
| Number of Pieces | 4 |
| Controller Type | Hand Control |
| Item Weight | 1.6 Pounds |
| Control Method | App |
| Manufacturer | Master Lock |
| Part Number | 6231NKA-4 |
| Item Weight | 1.55 pounds |
| Product Dimensions | 4 x 7 x 4 inches |
| Item model number | 6231NKA-4 |
| Is Discontinued By Manufacturer | No |
| Size | 4 Pack |
| Item Package Quantity | 4 |
| Special Features | Key Lock |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | MASTER LOCK PRODUCT WARRANTY: Limited Lifetime Warranty. Master Lock Company LLC (Master Lock) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlock.com or 1.800.464.2088 for instructions on obtaining repair or replacement. |
A**R
Looks really secure
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.
L**O
Works great for locking storage cages.
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.
C**H
High end locks
Highly recommend. Very hard to get any kind of cutters in to them. Have done a great job through some already very cold days.
J**G
Works great
Had to hand file so they would fit easily but I still like them.
S**T
easy & secure
This set of locks is a great value. Very tamper-proof and weather-proof design as compared to similar models they released in the past of a similar durability. Best part is having them all keyed the same out of the box.
L**E
Good lock
Good lock, solid protection. Clearance inside lock area tight, sometimes difficult to close & lock
L**L
They do the job.
This is the third set we purchased. My husband and son really like them. they are well worth the price.
A**R
Very heavy and well-made
This thing feels bulletproof. I ended up buying another after my first one
M**C
Sturdy body, but unreliable locking mechanism
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.
Trustpilot
2 weeks ago
5 days ago