Check out this awesome chess set, which was made designed by Dave Pickett, the Skeleton Key Chess Board.
“A chess set I designed around the function of skeleton keys. The skeleton keys are made of brass. One set was finished in liver sulfur petina and the other set was sandblasted. The wood includes curly maple and walnut.”
Dave designed this amazing chess board as a project for his 3d design class, lets hope he puts these into production, I would love one of these.