Panther Martin InLine Swivel Inline Spinner - Easier to use and they really catch fish! The Panther Martin InLine Swivel lures provide an easier and better way to use Panther Martins with a swivel. Instead of attaching a double eyelet swivel to an existing eyelet, these lures have the swivel mounted directly in a straight line on the Panther Martin spinner shaft. That keeps the great profile and spinning action. 6 different colors in 2 sizes.