Handmade using end-grain wood. End-grain cutting boards are unique as a result of the wood grain being perpendicular to the cutting surface as opposed to parallel.
What does this mean? Knives stay sharper longer (as a result of the knife edge "splits" the wood fibers as opposed to "cutting" them, end-grain boards are self-healing. The oiled surface causes the split fibers to swell and close the gaps created when using. Finally, end-grain boards are Bacteriostatic, as the fibers close, it prevents contamination on the board.