Hellefisk is a straight-forward fishing knife with a cork handle. The stainless blade of Sandvik 12C27 steel is thin and rather stiff.
The traditional sheath hangs from a thong. The knife weighs less than 2 ounces and it floats if it is lost overboard.
The Handle. Dry the handle with a soft cloth if wet and wax occasionally.
The Sheath. The leather needs to be impregnated occasionally with colourless impregnation agent (grease or wax) to keep supple. Dry the sheath carefully in room temperature if it becomes wet.
The Blade. Wipe the blade with a soft cloth if wet and treat with grease occasionally.
Remove the burr by stroking the blade gently over the sharpening surface on both sides, as if cutting very thin slices. Keep the bevel flat towards the sharpener and move from side to side until the burr is gone.
If the blade is very dull or damaged, use a fine-grained grindstone and plenty of water and sharpen until you have a raw edge. Use much cooling liquid and never sharpen on a dry stone. A hot-ground edge looses its heat treatment and ruins the blade.