Here's your item, because I happened to have a free moment in between fires...
Cloak of Living Chains
Aura faint transmutation; CL 3th
Slot Shoulders; Price 3,000 gp; Weight 10 lbs.
Description
This collection of many 5 feet long barbed metal chains is woven and designed to be worn as a cloak in an almost comfortable way.
As a move action the wearer can attempt a touch attack against a target in an adjacent square, if successful, the target becomes entangled as the chains ensnare it. While entangling a victim, the chains sink into walls, ground and any other surface to secure itself. A victim entangled cannot move from his square, but so does the wearer as long as he entangles at least one opponent. The wearer may free a victim as a move action.
A victim may attempt to escape from the grasp of the cloak as a move action by making a strength or escape artist check against DC 15 but doing so causes 1d4 points of damage as it violently tears himself out of the barbed chains.
Alternatively he can free himself with no damage and no check required as a full round action that provokes an attack of opportunity.
Construction
Requirements Craft Wondrous Item, Entangle; Cost 1,500 gp