You are skilled at disarming traps and opening locks. In addition, this skill lets you sabotage simple mechanical devices, such as catapults, wagon wheels, and doors.
1 If you attempt to leave behind no trace of your tampering, add 5 to the DC.
When disarming a trap or other device, the Disable Device check is made secretly, so that you don’t necessarily know whether you’ve succeeded.
The DC depends on how tricky the device is. Disabling (or rigging or jamming) a fairly simple device has a DC of 10; more intricate and complex devices have higher DCs.
If the check succeeds, you disable the device. If it fails by 4 or less, you have failed but can try again. If you fail by 5 or more, something goes wrong. If the device is a trap, you spring it. If you’re attempting some sort of sabotage, you think the device is disabled, but it still works normally.
Special A rogue who beats a trap's DC by 10 or more can study the trap, figure out how it works, and bypass it (along with her companions) without disarming it.
Retry? You can retry checks made to disable traps if you miss the check
by 4 or less, though you must be aware that you fail in order to try
You also can rig simple devices such as saddles or wagon wheels to work normally for a while and then fail or fall off some time later (usually after 1d4 rounds or minutes of use
The DC to open a lock depends on the lock's quality: simple (DC 20), average (DC 25), good (DC 30), or superior (DC 40).
Modifiers: If you do not have a set of thieves’ tools, these DCs increase by 10.
Retry? Yes. You can retry checks made to open locks.
The amount of time needed to make a Disable Device check depends on the task:
The spells fire trap, glyph of warding, symbol, and teleportation circle also create traps that a rogue can disarm with a successful Disable Device check. Spike growth and spike stones, however, create magic traps against which Disable Device checks do not succeed. See the individual spell descriptions for details.
Special: A character can take 10 when using Disable Device to arm or disarm explosives, but cannot take 20.
Time: Arming an explosive device takes 1 minute or more, depending on the scope of the job. Disarming an explosive is treated as if the explosive were a complex trap, and takes 2d4 rounds to attempt.