Iron collar and key

Wrought iron collar with a three inch locking device and a three inch key. The collar is made up of two pieces of iron attached with a hinged, chain link back. Each end of the collar has an eyelet that can overlap and the lock can be inserted in to. The lock has a cylinder locking mechanism and a curved shackle hinged on one side. The key has an eyelet on one end and a shoulder in the middle of the shaft. The teeth of the key are threaded like a screw.