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🔒 Small lock, big security—own your combo, own your peace of mind!
The Master Lock 630D is a compact, aluminum-bodied combination lock featuring a 3-digit customizable code and a nickel-plated steel shackle. Measuring just 1-3/16 inches wide, it offers lightweight yet durable security ideal for backpacks, cabinets, and luggage. Trusted by professionals and backed by a Limited Lifetime Warranty, it delivers keyless convenience and reliable protection for everyday essentials.























| ASIN | B00004SQLT |
| Additional Features | Passcode Unlock |
| Best Sellers Rank | #30,293 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #96 in Combination Locks |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Nickel |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.1 out of 5 stars 2,820 Reviews |
| Finish Types | Plated,Nickel |
| Global Trade Identification Number | 00071649005565 |
| Included Components | Unit^Instruction Guide |
| Item Dimensions | 5.56 x 2.75 x 0.7 inches |
| Item Type Name | Resettable Combination Padlock, 3/16 In Dia, 1 In H X 9/16 In W, Aluminum |
| Item Weight | 0.15 Pounds |
| Item dimensions L x W x H | 5.56 x 2.75 x 0.7 inches |
| Lock Type | Combination Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 630D |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Alloy Steel, Aluminum, Nickel |
| Material Type | Alloy Steel, Aluminum, Nickel |
| Model Name | Set Your Own Combination Lock |
| Model Number | 630D |
| Number of Pieces | 5 |
| Recommended Uses For Product | Luggage |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Passcode Unlock |
| Style Name | Small Size - Number Combo |
| UPC | 071649005565 |
| Unit Count | 1.0 Count |
L**Z
I have several, and have for several years. Never had any problems.
I know these are pretty easy to defeat, but they're inexpensive and convenient. I own about a dozen of them, and have NEVER had a problem with them resetting unexpectedly, "auto-locking" or otherwise causing issues as others have described. We keep one on our side-gate of our house, and yes, it needs to be lubricated occasionally to remain smooth, even in mostly-dry Southern California. But the three-number combo is simple and quick for our gardener and pool guy to utilize, and the lock is enough to discourage "opportunity" criminals from easily checking out our backyard. Just use them for an appropriate application. These will totally stymie toddlers, and all but the most undisciplined-but-determined little kids, for example for cabinets of paint/chemicals or ammunition storage. Will be completely ineffective against a patient kid (only 1000 combinations) or clever kid (read on the internet how to pick these), certainly not a teenager. People who hate these locks are simply not using them appropriately.
T**T
Perfect for traveling in hostels.
Perfect for traveling in hostels. Very strong and I love the keyless combination. Great value. Fits most lock boxes in the hostels.
A**A
It's ok.
I bought this lock back in 2018, and for several years, it worked reliably and served its purpose well. It was a dependable solution for securing my belongings at the gym and offered peace of mind without any hassle. Unfortunately, just yesterday, it stopped working – despite using the correct code, it wouldn’t open. I ultimately had to ask the gym staff to help break it, which was disappointing. However, considering it lasted for several years without issues, I can't complain too much. For the price and the years of service it provided, it’s been a decent product. Just be mindful that it might eventually wear out.
R**E
Locking mechanism is very cheap!
The lock broke in 2 months and would not open. I had to cut it off. This is my second lock and the first one had the same issue after about a year. These locks are horrible quality.
T**Y
Careful not to accidentally reset the combo
Not the highest quality master lock. Could accidentally reset the combo too easily. With that said, it’s easy to set the combo! And it works!
H**R
Ideal lock for specific purposes...
Ideal lock for specific purposes... I've been using these locks for over 20 years. I also have the four number version, but for specific purposes, I like this one better. I have NEVER had one of these locks work loose or not unlock for me. This lock is best when used for low security applications and applications that require "evidence of tampering." I used it mostly for garden sheds, especially those with "wimpy" plastic hasp and easily pried open doors. There is no keys to lose or to look after. Be careful and remember the position of the detent that is used to set the combination. If you accidently depress the shackle in the open position into the detent and move the numbers, you will accidently close the lock on a new unknown combination. If you do this on a four number combination lock, if would be more difficult to retrieve the actual combination. That's why I prefer the three number combination lock for low security applications. The first time it happened to me, I went through the 1,000 or so possible combinations. It took about an hour. Now, I have found that if it locks on an accidently set combination, I just try numbers close to my originally set combination. Retrieving the combination takes 10 minutes or so. I have the original brass body ones. The combination changing detent is located 180 degrees from the locking position of the shackle. On the newer aluminum body version, Master lock has redesigned it to be at the 90 degrees position, realizing that the lock is usually opened to the 180 degrees position and more readily accidently set. Basically, for a specific purpose, I LOVE this lock. They work and last almost forever.
D**E
basic quality
for the price it works, bought this just for my gym locker and so far no issues, you can change the combination make sure you do that.
L**B
Reliable lock for years
I had one of these locks for years and misplaced it recently. I immediately came on here to buy the exact same one. Never had any issues. Nice size and works just fine for the gym locker. Edit: the lock did jam while it was on my gym locker. Initially I panicked but after about 10 mins of fiddling it came open and is working fine. Idk.
J**S
Great little lock
A great little lock. I have a few of these. Not for high security but great for typical travel scenarios like lockers, locking backpack to luggage rack, etc. For keeping honest people honest and stopping quick opportunity type thefts. It’s quite light because of aluminum body (but steel shackle) and a little bigger than typical luggage locks and so probably a little stronger. I don’t normally give a 5 but I will in this case.
A**R
Nice Product
Product was as expected. Nice quality
C**N
Excelente precio
El candado llego a tiempo, demasiado rapido, el producto es de buena calidad, resistente y bastante util, es mas grande de los que esperaba y para locker queda perfecto.
C**A
Excelente selección
Es un candado pensado para locker de gym o parecido pero me soportó perfectamente el uso en maleta de viaje por avión, no se desgastó ni dejó de funcionar. La calidad del candado es buena y es muy fácil cambiar la combinación. No es la elección más profesional ya que solo tiene tres números de combinación, pero aun así es perfecta opción para un uso de seguridad medio.
P**L
Simple and works
Nice easy locks for ammunition storage
Trustpilot
1 month ago
1 month ago