This is stand for sharpening stones. You can easily sharpen knifes, scissors, chisels and so on.

Version 1 (yellow)

works well, but the cover for the stones is missing. I know, that is shorter than stones, but longer doesn't fit into the printer. Solved in version2 - divided in two parts.

Version 2 (orange)

is equipped magnetic lock (magnet diameter 8mm, 5mm long) and it works like transport box as well. I know, that the surface is not excellent, but not because of design, but printing process. So don't be afraid to print it.

Stones

are from Europe, Czech Republic: http://bushcraft.cz/vybaveni/noze-a-nastroje/keramicke-brousky-belsky-br/

č. 104 (A, B): BELSKY TRIANGEL, délka (lenght) 200 mm, strana(side) 12 mm, vrcholy (edges) trianglu: 1 x ostrý (sharp), 1 x kulatý průměr (round dia.) 1 mm, 1 x kulatý průměr (round dia.) 2 mm. Cena 110,- Kč (cca.4€).

I have also made this sharpener: http://www.thingiverse.com/thing:1274297 It give the precise shape, but than I aplly this one, to have sharper blade.

The diamond pencil is good to use for really dull knifes, if you haven't other possibility for first modification of shape (for example like this http://www.thingiverse.com/thing:1274297 ). Than I recommend to apply hard stones and than the finishing stones.

I chose the angle 20°, 30°, 40° but you can modify the design in Tincercad: https://www.tinkercad.com/things/2hasCCVXy6x

The diamond sharpener pencil is from Ebay.

There are instruction, how to use it: https://www.youtube.com/watch?v=s2DDpB8Pjho

They use some wires as protection. There are not present, in this design.