Open Lock Skill

General Skills Rules:

• Taking 10: If you are not threatened or distracted you can take 10 on a roll.
• Taking 20: when you have plenty of time, 2 minutes or more and faced with no threats or distractions, you can take 20. This does not count as a ‘natural 20’ and indicate automatic success. Generally this takes 20 times longer than normal. You can’t take 20 on any check that has consequences for failure.
• “1” Rolls: When you roll a natural 1 on a skill check, roll D20 again. SUBTRACT this number from your check.
• “20” Rolls: When you roll a natural 20 on a skill check, roll D20 again. Add this number plus the 20 to your check. 

Open Lock (Dex, Trained Only) Retries: Yes, each attempt after the first imposes a -2 frustration penalty, that lasts for 24 hours or until the character gains a level. Requires: a full round action.
Action and DC: 

• Very Simple Lock DC: 20 
• Good Lock DC: 30
• Average Lock DC: 25 
• Amazing Lock DC: 40
• Quick lock pick- as move action DC: +20 
• Without Thieves’ Tools DC: +2
• Masterwork Thieves’ Tools DC: -2