A device which when touched against a non-thaumaturgical or non-anomalous lock (doors, boxes, restraints, etc.), gives the user the option to lock or unlock the object.   Roll against your spell save with a d20. If it is equal to or lower than your spell save, your gadget use is successful. If you fail the spell or roll a natural 20, the lock becomes damaged and cannot be relocked or unlocked without brute force or repair.   On a successful cast, the lock either locks or unlocks (depending on what you chose), but becomes jammed and cannot be locked or unlocked again without repair.   This gadget will set off trap doors.   If there are more than one locks in the same mechanism or the lock is thaumaturgical, complex, etc.,  the gadget will fail.   If there are several simple locks in sequence, you must cast the spell on each one individually.