About Padlocks
More
High-Security Padlocks
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.
Shackle | Body | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Vertical Clearance | Horizontal Clearance | Dia. | Material | Ht. | Wd. | Thick. | No. of Keys Included | No. of Tumbler Discs | Specifications Met | Each | |
Dual-Locking Shackle Style | |||||||||||
Solid Chrome-Plated Hardened Steel Body | |||||||||||
| 1" | 1 1/4" | 9/16" | Boron Carbide | 2 1/4" | 2 7/8" | 1 1/8" | 2 | 11 | EN 12320 Grade 5 | 0000000 | 0000000 |
Weather-Resistant Extra-Clearance Resettable Combination Padlocks
Vertical shackle clearance is greater than 1". These corrosion-resistant padlocks are well suited for refineries and marine applications. Set your own combination and change it at any time.
Brass-body locks are the most corrosion resistant. Boron-carbide shackles are the most cut resistant.
Shackle | Body | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vertical Clearance | Horizontal Clearance | Dia. | Material | Ht. | Wd. | Thick. | Manufacturer and Model No. | Combination Type | No. of Possible Combinations | Features | Each | ||
Solid Brass Body | |||||||||||||
| B | 1 1/16" | 15/16" | 3/8" | Boron Carbide | 2" | 2 1/4" | 1 1/4" | Master Lock 1175 | Four Numbers | 10,000 | __ | 0000000 | 000000 |
| B | 2 1/16" | 15/16" | 3/8" | Boron Carbide | 2" | 2 1/4" | 1 1/4" | Pro Master Lock 1175LH | Four Numbers | 10,000 | Octagonal Shackle | 0000000 | 00000 |
| B | 2 1/16" | 15/16" | 3/8" | Boron Carbide | 2" | 2 1/4" | 1 1/4" | Pro Master Lock 1175LHRS | Four Numbers | 10,000 | __ | 0000000 | 00000 |
Weather- and Cut-Resistant Resettable Combination Padlocks
Shoulders cover most of the shackle, making it difficult to access and cut. These padlocks resist corrosion for outdoor use. Set your own combination and change it at any time.
Brass-body locks are more corrosion resistant than hardened steel-body locks. They also have a boron carbide shackle, which is harder and more corrosion resistant than a hardened steel shackle.
For technical drawings and 3-D models, click on a part number.
Shackle | Body | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vertical Clearance | Horizontal Clearance | Dia. | Material | Ht. | Wd. | Thick. | Manufacturer and Model No. | Manufacturer Series | Combination Type | No. of Possible Combinations | Each | ||
Solid Brass Body | |||||||||||||
| A | 1 1/16" | 15/16" | 3/8" | Boron Carbide | 2" | 2 1/4" | 1 1/4" | Master Lock 1177 | Pro | Four Numbers | 10,000 | 0000000 | 000000 |