A Swedish-made diamond sharpener in the form of a thin strip, backed with epoxy-based tape. It sticks easily to any flat surface as long as it is free from grease and dust.
Many people like to stick it on a knife sheath.
Length: 50 mm, Width 20 mm, Thickness 0.7mm
Diamonds: 60 micron monocrystalline of the highest quality rating (the coarseness corresponds to 300 grit)