This key chain is an unusual weapon. It typically is no more than 5½ inches long and about one-half of an inch in diameter, slightly thicker or the same size as a marker pen. The material usually is of a hard, high-impact plastic. The body often is lined with round grooves with a screw eye or swivel and split-ring attachment at one end for keys. Law enforcement officers must be aware offenders may attempt to use this key chain weapon against them.