The blackened and withered Hand of Callous Justice is forever trapped in the shape of a fist. Shrunken with age, someone long ago had the idea to incorporate it into a necklace so that the emblem of unflinching loyalty to the law could be worn about the neck.
Those wearing the Hand of Callous justice feel themselves strongly compelled to enforce the law in the harshest way possible- all but the most minor of violations demand the death of the perpetrator. The Hand's demands must be met immediately, lest the owner be stricken with unbearable agony until justice is served.
The Hand allows its owner to immediately become aware of any crime or dishonesty done in their presence, immediately granting complete immunity to the Criminal's attacks. Those using the Hand of Callous Justice find that those they are hunting are completely unable to strike them, their attacks passing through the hunter harmlessly.
The Hand carries a great burden of responsibility- should its owner commit a crime, the Hand of Callous Justice will demand their death, and subject them to relentless suffering and pain until their death- whether at their own hand, or by the next owner of the Hand of Callous Justice.