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.

Made from corrosion-resistant materials, these padlocks lock out equipment outdoors and come in a variety of bold colors that stand out from regular padlocks. The body of these locks is enclosed in a plastic cover to protect against physical damage and corrosion. To adhere to lockout identification practices, assign colors to individuals or functions, such as blue for plumbing and red for electrical. Use them with a hasp, chain, or another lockout device to comply with OSHA 29 CFR 1910.147 standards for safe lockouts.

Choose these padlocks if you need several locks that open with the same key. They have a pin-tumbler key locking mechanism, which is the most difficult locking mechanism to pick. The more pins a lock has, the harder it is to force open.

Steel-body locks are stronger and hold up better against break-in attempts than brass-body locks. Their shackle is boron carbide—the hardest and most cut-resistant shackle material available. To protect the internal components of the lock, they have a plastic cover over the keyhole to shield against water, snow, and other debris.

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