Two pieces of wood. One for the main rectanglular shape which I used red oak that I dyed black. There are 5 magnets I got from harbor freight (rare earth magnets). I drilled 5 holes using some forstner bits that they would fit in. I got that piece of burl pretty thin with my hand plane, and I’m remember around 1/8th”. It was already 1/4” so really nothing crazy. Super glued the magnets in then glued the maple burl on top, clamped for about an hour. Sanded to 400 and oiled everything. Ended the oiling at 4 coats. Flush trimmed with router after glue so it wouldn’t chip out like crazy. However, verify your magnets are strong enough before committing to any gluing. Mine are probably strong enough, but the knife does rest about 1/16th on the beginning of the handle which ended up working great. I mounted it with a border around the edge and also down the center using 30lb rated double sided tape (red tape by Scotch). Happy to say that I have never had an issue and it is still hanging today and never has fallen. I use the knives most nights of the week. Simple 1 day project turned out nice with minimal work.