Sonik SK3 Fly Fishing Reel. The Sonik SK3 Fly Fishing Reel The new Sonik SK3 cassette fly reel comes complete with three spare spools and neoprene case, all for £54.99. Engineered to provide lasting performance and durability, the precision die cast alloy frame is finished in a smart gloss black finish with clear composite spools which are fully interchangeable for either left or right hand wind. The large arbour design increases the speed of line recovery and reduces line memory, whilst the smooth and powerful disc drag willcope with strong running fish with ease. An easy, push button spool release makes it easy to change lines quickly, a factor that can prove very important when competition fishing from a boat.