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🔐 Secure your essentials with style and strength — don’t get left unlocked!
The Master Lock 140D is a 40mm solid brass padlock featuring a hardened 6mm steel shackle and a 4-pin cylinder with dual locking levers for superior cut, pick, and pry resistance. Perfect for securing backpacks, lockers, and storage, it combines compact design with corrosion resistance and comes backed by a limited lifetime warranty from a trusted industry leader.

| ASIN | B00004SQL7 |
| Additional Features | Key Lock |
| Best Sellers Rank | #7,020 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Keyed Padlocks |
| Brand Name | Master Lock |
| Color | Brass |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (8,721) |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649375507 |
| Included Components | Keyed Padlock |
| Item Dimensions | 0.2 x 1.57 x 2.76 inches |
| Item Type Name | Solid Brass Keyed Padlock |
| Item Weight | 0.12 Kilograms |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Warranty Description | LIMITED WARRANTY |
| Material Type | Brass |
| Model Number | 140D |
| Recommended Uses For Product | Gate |
| Shape | Rectangular |
| Style Name | 7/8-Inch |
| UPC | 071649375507 |
| Unit Count | 1.0 Count |
C**Y
Great little lock
Great lock for suitcases
R**N
Great Step Up for Beginners - Perfect for Yellow Belt Practice
I’ve gotten pretty decent at picking standard locks—usually, I can get through them in under 10 seconds. However, this Master Lock 140 definitely puts up a fight! It took me about 45 seconds to get it open the first time, which is exactly the kind of challenge I was looking for. The Highlights: Security Pins: Whatever is inside (likely a spool) provides great feedback and resistance. Rotation: You can really feel the core movement and counter-rotation, which is perfect for learning how to handle security pins. Belt Ranking: If you’re following the LPU (Lock Picking United) rankings, this is a solid choice for Yellow Belt practice. I’m sure I’ll get my time down as I get used to it, but I highly recommend this for anyone moving past the absolute basics and looking to practice their "feel" for security pins.
C**K
Nice padlock
EXACTLY what we needed and as pictured/advertised. Received quickly and in excellent condition.
C**A
The right lock for the job!
Works as expected. It the right size for the health club and public pool lockers.
L**P
Good set of locks
Things have been picking up legs and walking off on my property lately. So, I have been doing anything proactive I can to protect what I have left. I actually purchased one of these locks to lock my riding lawnmower to a post. I may not stop a theft, but I'm going to try my best. Also one on my pool gate, and one on each on two shops or sheds that I have in addition to the regular door looks. It's nice that several came together in one set. They are not huge heavy locks, but they are fairly nice sized and they worked out perfectly and did exactly what I needed. I really like that the set all have the same key so it's easy to keep up with them, that was nice. The set comes with two keys, and the keys fit all the locks. So I'm not fumbling for a key on each lock and my husband and I both have our own key. The locks move smoothly and engage well. I've had no issues or problems with any of the four locks. Hopefully they will at least deter would be thieves. Great locks reasonably priced. I would recommend.
J**L
A Good Lock
These lock look great! May not be the best in a high security area but it will help keep a honest person honest.
A**R
Fits pelican v100
Works. It’s a master lock so well made. Fits pelican v100 nicely
J**S
Great lock! Good price
Great lock! Good price
C**E
One of the locks has come with some sort of glue in the mechanism. This makes it impossible to get the key into. Not impressed!
R**O
Excelente producto, le estoy dando el uso para asegurar mis estuches Pelican 1750, no quedan súper justos, pero cumplen súper bien su función... además, los cuatro candados con una misma combinación de llave...
S**E
Good locks have put them outside but will be spraying silicone spray on them so they dont rust
I**.
Comprei e estou gostando
S**E
Fantastic thankyou
Trustpilot
3 weeks ago
3 weeks ago