Boning Knife 5.8406.16cm Yellow Handle - Swibo with Scabbard. The Victorinox Swibo range of boning knives are used by chef's, butchers and fisherman around the world because the quality is a given. Boning knives are a preferred filleting tool among those in the know due to the less flexible thin blades that some filleting knives have. The signature bright handles of the Swibo knives are injection moulded and sealed onto a polished, high grade stainless steel blade. Comfortable and non-slip, with no micro-pores or cracks for hygiene and sterilisation purposes.