Sheath to protect knife edge and fingers.  I printed mine out of bridge nylon because I thought that it might be more durable and less prone to breakage.  So far I like it very well (except for the latch getting caught in the blade holes)Sheath works great, but I slightly changed the design after printing mine because the latch gets caught in the holes in the knife blade and a very small portion of the edge near the handle is not protected.The design I printed is labeled _originalThe Updated design is labeled _updated - I believe that it is good, however, I have no need for a second cover and have not printed it.Feel free to play with the OpenSCad design to modify for your own purposes.  I believe that the design should be fairly easy to modify (parameters), but it is also tailored to this knife and I have not tried to adjust it to fit any others.If you load both designs in Cura, you can easily see the differences in the latch - slightly wider to secure better and higher to hopefully avoid getting caught in the holes in the blade.  You might also see the angle in the updated design is 1 degree greater to hopefully cover the tiny bit of exposed edge that I had in my original design.By the way...  I printed mine standing on edge as you see in the Cura photos.  I don't think it will be successful printed in any other orientation.Thanks & safe cheese cutting! (and knife storing)