Squire 660

Difficulty Notes

The Squire 660 has the strongest spring tension in the Squire range (220-770). It is described as a 'real problem' for the commenter, who only picked it once. Users note that while it can be opened 'fairly easily' with the right tools (Nigbee), it requires more effort than a standard four-lever padlock.

Sources (r/lockpicking):
- u/DavidthePicker (2pts): 'the 660 appears to have the strongest spring tension... This Squire 660 is a real problem for me - only picked it the once!'
- u/stevenlowel69 (1pts): 'Even a four lever padlock takes more effort'
- u/ajslocksandlocks (1pts): 'currently trying to run before I can walk with a battleship'
[confidence: medium]

Picking Notes

Requires heavy tension; users report starting with the first lever and then the second lever. One user mentions using a skeleton key filed down to fit a lever pick.

Sources (r/lockpicking):
- u/derpserf (6pts): '...require very heavy tension'
- u/ajslocksandlocks (1pts): 'picked my first and second lever on Monday night'
[confidence: medium]

Tension Tips

Requires very heavy tension. Users recommend using cheap, disposable tools for this lock to avoid damaging expensive tension tools.

Sources (r/lockpicking):
- u/derpserf (6pts): 'They're specifically for squire 440 and 660 padlocks which can sometimes require very heavy tension, and I don't like using good tools on those.'
- u/DavidthePicker (2pts): '...the 660 appears to have the strongest spring tension.'
[confidence: medium]

Bitting Variance

The Squire 660 is noted for having the strongest spring tension among the Squire series (220, 330, 440, 550, 660, 770). It is a 4-lever lock with sprung-loaded levers. The internal mechanism is similar to a door mortice lock. One user mentioned bending an expensive tension tool on this specific lock model.

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