We consider a heavy duty key lock to be a worthy investment in the long run. Let’s take you step by step, type by type, and find the best heavy duty key lock for you.

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Our Top Picks:

Best Overall: Buy: Master Lock Heavy Duty Key Lock READ REVIEW

Best For Stainless Steel Body: Buy: Brinks Heavy Duty Key Lock READ REVIEW

Best For Indoor Use: Buy: Puroma Heavy Duty Key Lock READ REVIEW

Best For Doors: Buy: Master Lock Toughest Lock READ REVIEW

Best With Fast Shipping: Buy: Thirard Heavy Duty Key Lock READ REVIEW

Best For Outdoor Use: Buy: Mindy Heavy Duty Key Lock READ REVIEW

Best For Underwater Applications: Buy: Diyife Heavy Duty Key Lock READ REVIEW

Best For Gun Cases: Buy: Fu Volante Heavy Duty Key Lock READ REVIEW

Best Overall: Master Lock Heavy Duty Key Lock

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Best part: Master Lock Heavy Duty Key Lock costs reasonable and it is available to ship in 24 hours. The master lock heavy duty key lock is perfect for storage container,s has matching keys, It feels very sturdy and has an excellent design. Laminated steel lock body with a weather resistant cover and a tough-cut octagonal boron-carbide shackle is 50% harder than hardened steel. And, the lock works great, is perfect for storage boxes, It comes with bolt cutter proof and has a waterproof design.

The lock has great locks, it is designed for a great price and has a classic design. In addition, the lock comes with a key and is best used for outdoor storage and fences, self-storage units and lockers, tools, job boxes and more. Above all, the master lock heavy duty key lock is used for tool boxes, looks heavy duty, It is good for only two keys and has a specifications design.

Almost all buyers quickly discovered that the lock has a protective 'flap' over it that stays very well. Further, they say that the lock is great value for 3 keyed alike padlocks, but the master lock should provide more keys. And, they strongly agree that this is a great lock with smooth operation, making it easy to open. To sum up, most customers found the lock suits best, and no one questions it.

• This is built with excellent quality, it is turn - key and has secured design.
• This will be the easiest way to obtain extras.
• This is perfect for school lockers.
• This is great for securing, is black, It is highly recommended and has a simple design.

Best For Stainless Steel Body: Brinks Heavy Duty Key Lock

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Brinks offer a variety of locks for personal choice and yet maintain quality in all the variants. The Brinks Heavy Duty Key Lock is highly cut resistant and round shielded design minimizes shackle exposure, further increasing security. Make sure this fits by entering your model number. Further, it is corrosion resistant, which allows it to work inside or outside, rubber jacket reduces scratches on surfaces.

The lock is commercial, It is ideal for heavy duty and has a safe design. Moreover, it will for excellent value and has an excellent design. Most importantly, the brinks heavy duty key lock features a 4 pin key cylinder, making it resistant to lock picking.

Most buyers quickly discovered that the lock is the best lock with least exposure to vandalize. Further, a few also found that the lock is a good choice because they are harder to cut off than traditional old school pad locks. Moreover, they say that this lock has covered everything and only the shaft that is needed to lock makes it very safe.

• This makes for great security, it does the job and has a safety design.
• This is a sturdy lock and great value.
• This is great for storage container,s locks easily, it is substantial and has a secured design.
• This is durable, works smoothly, its color is black and has a secure lock design.

Best For Indoor Use: Puroma Heavy Duty Key Lock

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Compared with other locks in this category, the Puroma heavy duty key lock has a convenient design. The Puroma Heavy Duty Key Lock protects against bolt cutter attacks. Make sure this fits by entering your model number. Furthermore, it has a 2-3/4 inch wide lock body.

The lock comes with different keys, is made with prompt shipping and it is used for heavy-duty. And, it is commercial, is very happy, it is great for high quality and has specifications design. Most importantly, the puroma heavy dutykey lock is good for good quality, It is perfect for heavyduty and has a secured design.

Most customers agree that the lock will work on the inner hole and the handle. In addition, they strongly agree that the lock will certainly work for a locker. Further, a few say that the over all lock is small enough to fit in the recess provided for the lock in the shed doors, preventing someone from being able to cut the lock off. Overall, many customers have used the puroma heavy duty keylock for more than a few months without any problems, and it shows no sign of giving up.

• This is as good as most more expensive locks that are similar to this one.
• This is a two - handed operation, although two days in it’s working fine.
• This is great for storage unit,s but not for uhaul.
• This serves its purpose, It is made with a sturdy structure and has a solid design.

Best For Doors: Master Lock Toughest Lock

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If you often find yourself confused about convenient and suitable lock, master lock, the toughest lock, should be your first option for buying. The master lock, the toughest lock, comes with a tough-cut octagonal boron-carbide shackle. is best used as a gate lock, shed lock, and storage locker lock. Make sure this fits by entering your model number. Also, it can be clipped with bolt cutter proof and it has spool pins.

Most importantly, the master lock, the toughest lock, has a hardened steel body and it makes for solid construction.

Almost all customers found that the lock is used for a security chain on an entrance gate. Further, they also found that the lock is easy to pick five-pin core. Moreover, they say that the lock states 10/10 for max pick resistance, best cut resistance, best weather resistance, solid steel strength.

• This comes with different keys and it is very large.
• This includes one padlock, two keys.
• A removable cylinder provides the ability to rekey your lock.
• This is great to keep out kids, teens and people who can't pick a lock.

Best With Fast Shipping: Thirard Heavy Duty Key Lock

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Thirard has been making great locks for years, thanks to a combination of clever design and appropriate materials. The third heavy duty key lock has 2pcs of brass keys, Every key has numbers. Solid brass padlock *1 + key * 2solid brass padlocksfor outdoor use features 2 in. All these keys can unlock the same series of locks but cannot do in different series of locks.

The lock would be perfect with a locking mechanism and it is made with fast shipping. Finally, the third heavy duty key lock is made with very functional locks and it is perfect for good size.

Most customers quickly discovered that the lock comes with two keys and all four keys will open up both locks. Also, they also found that the lock was perfectly suitable for that purpose. Further, a few strongly agree that the padlock bodies have a brass machined satin finish, and ( not sharp ) beveled edges and corners.

• This is constructed with high - performance solid brass for all-weather use.
• Padlock set：1pcs keyed alike padlocks in one bag.
• It is easy to use the same key.
• This is perfect in the outside environment.

Best For Outdoor Use: Mindy Heavy Duty Key Lock

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Next on the list, we've got yet another lock that manages to win our hearts. It's the Mindy Heavy Duty Key Lock and it's widely considered as the lock that has the most suitable features. The mindy heavyduty keylock is great for customer service and it is great for heavy duty. Heavy duty padlock high security to keep your property safe. It is suited for pods, storage units, garages & sheds, trailers, mobile trucks, outdoor gates, warehouses, logistics, doors, storage, moving trucks, etc. These locks also have removable cylinders to key alike or re-key.

The lock is perfect for stainless steel shackle, It is beautiful and has a safe design. Further, they are rust and corrosion proof, making them ideal for indoor and outdoor use for long-lasting protection. Most importantly, the mindy heavy dutykey lock can hang with name brand, It is made for good value and has specifications design.

One customer says - "Using this lock as a spare tire lock. ". Almost all buyers agree that the lock can be used as an outdoor gate lock.

• Manufacturer says: we will replace or refund you if you have any problems.
• This is made of zinc alloy with a brass cylinder.
• Indoor and outdoor locks provide general security and protection for your valuables.
• It is very heavy and it is good for 4 keys.

Best For Underwater Applications: Diyife Heavy Duty Key Lock

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The Diyife Heavy Duty Key Lock's superior materials makes sure that it ages well with use. The diyife heavy duty key lock is very sturdy, is black and it does the job. Make sure this fits by entering your model number. The interlocking part between the lock beam and the lock body is very thick, anti - pry.

The lock is perfect for indoor and outdoor use, such as lock cabinet, courtyard, gate, fence, garage, gym locker, shed etc. Above all, the diyife heavy duty key lock is suitable for indoors and it makes for a great buy.

Most customers think that the lock is perfect for underwater applications. And, they say that the lock works well and looks like it would hold up in the weather.

• This is great for wide applications and it has a sealed waterproof coating.
• 【Sealed waterproof coating】fully wrapped waterproof plastic coating, waterproof and dustproof, ideal for outdoor use.
• It is very happy and it has an internal structure.
• This is durable and it looks well made.

Best For Gun Cases: Fu Volante Heavy Duty Key Lock

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The Fu volante heavy duty key lock's superior materials makes sure that it ages well with use. Moreover, the lock comes with different keys, including 10 padlocks and it is designed for heavy duty. Make sure this fits by entering your model number. Finally, the Fu Volante Heavy Duty Key Lock offers more security, Dual locking levers provide extra pry resistance.

In short, buyers found this to be one of the best locks for daily purposes.

• 10 pack keys alike laminated steel padlocks with a short shackle.
• Includes: 10 padlocks, 20 keys; all keys open all locks.
• Delivers what they promise.