The steels used by Nesmuk guarantee an extreme and enduring sharpness. For keeping your folder sharp, we recommend using the Nesmuk folder strop. It is as thoroughly engineered as the folder itself. The core is made from dark brown grenadilla and carries two leather straps coated with a fine diamond paste. Drag the edge over the leathers three or four times - first rough, then fine - to maintain the blades sharpness. The folder strop comes with a fitting leather case. Measurements: length 15 cm / width 3 cm