These are the 6 best and most popular Panther Martins that theysell. 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.