An intriguing mental and physical challenge. It's difficult to solve, satisfying to hold, and beautiful to display. Composed of eight pieces of brass and stainless steel, the components fit together to form a cube with gently rounded edges. The Tycho Puzzle also features a hidden interior cavity that’s a perfect place to conceal a meaningful surprise. The solution to the puzzle might initially seem obvious, but upon closer inspection there are nuances, asymmetries, and interferences that prevent a simple stacked approach. Specifications * Die-cast Brass and Stainless Steel * 1.8" x 1.8" x 1.8" * 1 lb, 8 oz