The Code38 is fitted with a curved plain-edged foil blade designed to have its edge sharpened using a knife sharpening steel. A standard chef's knife steel is ideal.
 
Step one
Rest the knife steel on the blade of the wine key so the steel is just resting on the blades edge.
sharpening-angle
Step two
With moderate to light pressure simultaneously pull away and along the blade.
start-sharpening-here
Step three
Once at the end of the sharpening stroke, repeat again 2-3 times
end-sharpening-here
Step four
Repeat this procedure for the other side of blades edge.
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