Aogami No. 2 Double-Edged Horse Mackerel Knife, Black Finish, 3.5 sun (10.5cm) This is a double-edged, black-finished horse mackerel knife. Because it's double-edged, it can be used by left-handed people. You can fillet sea bream and other small fish with it. The core material is Yasuki Aogami No. 2 steel, with a round handle and comes in a special box. Knife size: Overall length 228mm, blade length 105mm, maximum spine width 2.5mm, maximum width 39mm, weight 65g