Lock Dog Bypass
Some padlocks can be bypassed by inserting a tool, or multiple tools, through the keyway and releasing the shackle. The attack can also be done to locks found on filing cabinets and tool chests. This attack may also work on various other locks not listed here. Although this attack is mostly used for Master Locks, it also works on other unshielded locks.
Technique
The bypass tool is inserted into the the keyway and into a hole behind the pins. It is then pulled towards the opposite side of the keyway. This pulls the locking dog out of the shackle so that it can be opened. In padlocks that lock at both the heel and toe of the shackle, both of the lock dogs need to be pull on. Because of this, most bypass sets some with two tools, one for each lock dog.
Vulnerable Models
The following locks are known to be vulnerable to this bypass:
- Master Lock No. 1
- Master Lock No. 2
- Master Lock No. 3
- Master Lock No. 4
- Master Lock No. 77
- Master Lock No. 140
- Master Lock No. 150
- Brinks 662-44029
- Slaymaker
- Hercules
- Ludell
- Sargent 752HS & 753HS
- Taylor 781 padlocks
- Hon
- Waterloo
- Hudson
- Stanley
- S&G
- Yale
- Chicago
- 6842
- Craftsman
- Eagle
- Husky
- Fraim
Bypass Tools
These bypass tools can be used to exploit the vulnerability
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