Knife sharpening angle guide 20 degrees - reference wedge, not a holder

Angle reference wedge for freehand sharpening. 70 x 45 mm, and its sloped face makes EXACTLY 20 degrees with the base: the ramp runs 60 mm while rising 21.84 mm (tan 20 = 0.36397), starting from a 4.16 mm front step, which puts the heel at 26.0 mm. You set the spine of the blade against the sloped face to take the angle by eye, then go to the stone holding that angle. The 20 is engraved 1 mm into the SIDE of the wedge - engraving the sloped face would give a pocket with a flat floor, so the dep…

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