The exploits of Dan Garrett, a rookie patrolman who, by wearing bullet-proof blue chain mail, transformed himself into the mysterious Blue Beetle, a daring crusader for justice.His calling card was a small beetle-shaped marker that he left in conspicuous places to alert criminals to his presence, using their fear of his crime fighting reputation as a weapon against them. For this purpose he also used a "Beetle Signal" flashlight. The Blue Beetle's reputation was not his only weapon -- he carried a revolver in a blue holster on his belt, and was sometimes shown wearing a multi-pouched belt after the style set by Batman. Also in the Batman vein, the Blue Beetle had a "BeetleMobile" car and a "BeetleBird" airplane. In at least one radio adventure, he carries something called a "magic ray machine". The ray machine was a sort of super-scientific cutting device.