C.E. Smith Drop-In Swivel Rod Holder - Drop-in Swivel instantly converts any in-gunnel rod holder to a swivel rod holder. Fits inside any rod holder with 1-9/16in or larger inside diameter. Investment cast 316L stainless construction. Smooth turning adjustable swivel resistance. Features: Fast trolling heavy baits Bottom fishing with electric reels Bent butt rods Fighting big fish from the rod holder