Panther Martin Best of the Best Inline Spinner Kit - These are the 6 best and most popular Panther Martins. They are sure to catch you more trout, bass, pike, perch, crappie, salmon, steelhead and walleye than ever before. Panther Martin spinners feature unique inline "Double Reverse" Concave, Convex blades that are mounted directly on the shaft so they always spin at a 40 degree angle to the shaft in a perfect balanced position, even for upstream cast. Unique inline "Double Reverse" Concave Convex blades that are mounted directly on the shaft