Some guys use a shadow box that they seal off from moisture. Other guys build their own display cases. Some guys use boxes like the ones on classicshaving. I'm probably going to build my own box since I haven't gotten anything for display.
The 12 hole one is oval made with a dremel and was tough to do. I did the 38 hole one with marking every inch and drilling with a 7/8 inch forstner drill bit. The round holes are much easier to do.