Protect your most valuable items with our most secure padlocks. From top-to-bottom and inside-out, these padlocks were designed and tested to stand up to different kinds of break-in methods. They’re certified EN 12320 to prevent access from lockpicking, drilling, cutting, prying, and hammering. If someone tries drilling the lock, a free-spinning plate within the key cylinder spins continuously to prevent the drill from penetrating the cylinder. The shackle locks at both ends to keep it from being forced open, and it’s made of boron carbide—the hardest and most cut-resistant shackle material available. Hardened for strength, the steel body resists breaking if struck. For extra security, these padlocks are keyed differently, meaning the same key can’t be used with multiple locks.

EN 12320 designates levels of security for padlocks on a scale of 1 to 6. Grade 5 means these padlocks were tested against powerful blows, cutting, drilling, pulling, and twisting.

For technical drawings and 3-D models, click on a part number.

Choose these locks if you need several locks that open with the same key. If the lock or key with the key number you want isn’t listed, order the "Other Key Numbers" and specify your desired key number.

Zinc-body locks are more corrosion resistant than steel-body locks, but are not as strong. Hardened steel shackles are stronger than steel shackles.

Disc-tumbler key locking mechanisms are harder to pick than basic warded locking mechanisms.

For technical drawings and 3-D models, click on a part number.

Vertical shackle clearance is greater than 1". Choose these locks if you need several locks that open with the same key. If the lock or key with the key number you want isn’t listed, order the "Other Key Numbers" and specify your desired key number.

Zinc-body locks are more corrosion resistant than steel-body locks, but are not as strong. Hardened steel shackles are stronger than steel shackles.

For technical drawings and 3-D models, click on a part number.

Vertical shackle clearance is greater than 1". Choose these locks if you need several locks that open with the same key. If the lock or key with the key number you want isn’t listed, order the "Other Key Numbers" and specify your desired key number.

Disc-tumbler key locking mechanisms offer good pick resistance.

For technical drawings and 3-D models, click on a part number.

For added security, locks have specially designed keys that cannot be duplicated and cannot be removed when the lock is open. Choose these locks if you need several locks that open with the same key.

Stainless steel-body lock is stronger and more corrosion resistant than brass-body locks. It has a concealed shackle to make it more difficult to cut.

Stainless steel shackles are more corrosion resistant than hardened steel shackles, but not as strong.

Disc-tumbler key locking mechanisms offer good pick resistance. When choosing between padlocks with seven or eleven discs, the lock with eleven discs is harder to pick.

For technical drawings and 3-D models, click on a part number.

Choose these locks if you want individual locks or groups of locks that open with their own key, but also open with a master key. The included keys have random key numbers; master keys are sold separately.

Zinc-body lock is more corrosion resistant than steel-body locks, but is not as strong.

Hardened steel shackles are stronger than steel shackles.

For technical drawings and 3-D models, click on a part number.

Vertical shackle clearance is greater than 1”. Choose these locks if you want individual locks or groups of locks that open with their own key, but also open with a master key. The included keys have random key numbers; master keys are sold separately.

Zinc-body lock is more corrosion resistant than steel-body locks, but is not as strong.

Hardened steel shackles are stronger than steel shackles.

For technical drawings and 3-D models, click on a part number.