Master Lock 140D

Row	Detail
Price (USD $)	8-10
Lock Type	Padlock
Lock Design	Pin-tumbler
r/lockpicking Belt Rank	Yellow
Pins	4
LockWiki Link	https://lockwiki.com/index.php/Master_Lock_No_140
Manufacturer Page	https://www.masterlock.com/products/product/140D
Manufacturer Page (backup)	https://web.archive.org/web/20230521084727/https://www.masterlock.com/products/product/140D

Vulnerability

I was able to pick this lock one pin at at a time using the Covert Instrument top-of-the-keyway tension tool and a short rake. In addition, I was able to rake the lock using a top-of-the-keyway tension tool from the Covert Instrument kit and a quad rake. The tension needed to pick this lock is on the lower end. A small constant nudge is enough to hold the driver pins above the shear line. There is another vulnerability I was able to notice in this lock. I was able to access the bolt/latch and release the shackle, allowing me to unlock the lock without turning the plug.

Proof

Sources:

• https://www.flickr.com/photos/lpubeltapp/52874819595/in/album-72177720308066584/