(1219) Challenge: Erroneous Designs Unpickable Brinks Lock
21:01
(1218) Challenge: Jillian's Ultimate Effort
21:30
(1245) Challenge: Locksmith Nick
17:48
How to Design an Unpickable Lock
20:56
Not Many People Know This Secret of Coins! Very Useful
17:44
(1362) Challenge: Blocked Out!
13:42
[593] Gallium vs. Titalium - Abus Padlock Meets a Gruesome End
14:23
(1237) Challenge: Jacob's Keyway Trick
15:36