Marttiini Classic Six Inch Fish Filleting Tool The Marttiini family of fish preparation tools are legendary amoungst the angling fraternity for robustness, longevity and quality. Indeed more have been lost than worn out, and this lies testimony to what an angler gets when they purchase one of these. The Marttiini Classic Six Inch Fish Filleting Tool is without doubt one of the best known and trusted tools around. Built with a nice solid birch handle fully varnished, high grade material and coming complete with a light tan fully protective holder.