I made a few knife racks lately. One is made from laminated solid oak, another is solid live-edge maple, and the third is solid live-edge cherry from a friend's tree. Two rare-earth magnets are recessed into the surface, below the plane of the wood, and hold any knife with ease. I don't have photos of the back side, but they each have small feet to hold them up. I use Osmo Poly-X Oil for the finish.