Wikipedia
Spinnerbait
A Spinnerbait refers to any one of a family of fishing lures that get their name from one or more metal blades shaped so as to spin like a propeller when the lure is in motion, creating varying degrees of flash and vibration that mimics small fish or other prey. The two most popular types of spinnerbaits are the 'in-line spinner' and 'safety pin' spinnerbaits, though others such as the 'tail-spinner' also exist. Spinnerbaits are used principally for catching predatory fish such as perch, pike and bass.