The material below is Open Game Content from a 3PP Source
Ring of Maniacal Devices
Aura faint transmutation; CL 3rd
Slot ring; Price 5,000 gp; Weight —
This deceptively precious looking ring grants the wearer a +5 competence bonus on all Craft (traps) and Disable Device checks. Even if he has no ranks in these skills, the wearer may make Craft (traps) and Disable Device checks as if he were trained in them.
Requirements Forge Ring, foxs cunning, creator must have 5 ranks in the relevant skill; Cost 2,500 gp