Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying

I originally chose this U-lock for a bicycle, but I ended up using it to secure the door on our outdoor shed, and it has worked extremely well. The lock feels very sturdy and well made. It’s easy to lock and unlock with the included keys, and the solid construction gives me confidence that it’s helping keep our belongings secure. I also appreciate that the protective coating helps prevent scratches. Even though it’s marketed as a bike lock, I found it to be a versatile security lock that works well for other outdoor applications too. If you need a dependable lock for a bicycle, shed, gate, or similar item, this is a great option. Overall, it’s a quality Master Lock product that’s simple to use, durable, and provides excellent peace of mind.

The best bike lock on the market not only secure but turn thieves away instantly on sight

This lock saved my scooter from getting stolen! It was bent out of shape but never broke! It had to be cut off so I am ordering a replacement now! I highly recommend!

Good deterrence thick enough outside the most determined. Only issue is the ubar comes out completely. Slower for unlocking applying and locking.

Awesome lock! trusted in a crazy neighborhood and fairly priced would recommend

Great lock. Needed it for my scooter and never failed me once over 1 year of use. Couple of my friends had a wire lock and their scooters unfortunately got stolen. The lock is very durable, and it comfortably fit around my scooter with no struggle. Also, had to ship the lock across the country in the same box as the scooter and it did get banged up a bit with visible scratches but it didn't affect the durability at all! Ended up forgetting my key at times too, but luckily they give a backup key! Only concern would be that the key is annoying to use sometimes, but never bothered me in any significant way. Definitely recommend.

Easy to lock and very sturdy lock and key. I know I feel safe with this.

Super high-quality Master lock; I like it because it keeps my scooter secure.

The Master Lock Black Bike Lock with Key impressed me with its solid construction and sense of security. The lock's quality was apparent from the first use. While I haven't had the unfortunate need to test it against actual theft attempts, I felt confident in its ability to deter thieves. The lock felt very sturdy, and I often tried to pull it apart with my hands to test its strength, finding it very resistant to force. The lock features an integrated disk keyed locking mechanism, which was straightforward to use, though I'm not entirely familiar with the technical details of this mechanism. However, each time I used the lock, it required a bit of effort to lock and unlock efficiently. This could be due to the lock's solid construction, which, while providing security, also made it slightly cumbersome to operate. The description mentioned a vinyl coating, which I'm not entirely sure about in terms of its function or appearance. However, the lock looks well-made and durable. Its weight is significant, which is a positive aspect in terms of security but made it inconvenient to carry in a backpack. Instead, I opted to hang it on my bike during rides, avoiding additional weight on my back, which could affect my riding comfort and speed. Overall, this lock represents a good investment, particularly compared to cheaper alternatives I've used in the past, such as those from Dollarama. It offers a higher level of security and build quality, making it a valuable addition to my biking gear.

prima schloss...funktioniert gut.

Practico y economico, funcional y seguro

For this price this is a great lock, I have been using it for a few years in the city and have had no thefts or issues with the lock. It is a bit heavy but this is to be expected for a metal lock.

Don't recommend this product at all, the holder broke after less than 5 uses and the quality of the lock doesn't seem great. Better to spend a bit more and get something decent.