how to sharpen a straight razor

...Sharpener 1. This is the most versatile kitchen knife and scissors sharpener! Not only quickly sharpen very dull or damaged blades, but also hone for razor sharp; Sharpening both straight edge and serrated knife; Not only for Euro/American knife, but also Santoku & other Asian style knives of double-beveled edge; Except knives, it’s ideal to easily grind scissors blade. 2. 4 Sharpening

... like 4 sets of knives for your machine. The 4 cutting edges have the 30 degree corners are chamfered. Easy to change the cutting edge or replace. They are sharpened to a razor edge on 4 sides It