Pyramid Puzzle 4 Piece

This wooden mechanical puzzle is comprised of 4 oddly shaped pieces, which will make a perfect 3 sided pyramid (Tetrahedron). Even though there are only 4 pcs, the puzzle is surprisingly difficult. Its a great one to leave on a desk or coffee table for people to try, as it looks easier than it is. Comes in a base and measures about 3.5" across the base.