PANTHER MARTIN: Integrated swivels built in a straight line directly on the spinning shaft of the spinner. FISHING HOOK TYPE: Treble Hook INLINE SWIVEL REGULAR FLY : Convenience of having the swivels already attached to the spinning shaft. INLINE SWIVEL : Eliminates any line twist or need to tie on double eyelet swivel. PREMIUM QUALITY: Greatly reduces water resistance & weed snag of traditional double eyelet swivels. FISH SPECIES: Brook Trout, Brown Trout, Rainbow Trout, Walleye, Nothern Pike, Muskie, Largemouth Bass, Perch, Crappie, Salmon, Steelhead, Kokanee, Pickerel, Grayling, Bluegill, Dolly Varden, Arctic Char, Smallmouth Bass, Whitefish, Sunfish, Pumpkinseed, Panfish, Warmouth, White Perch, White Bass, Peacock Bass, Blackfish, Northen pikeminnow, Bowfin, Snakehead