Can you take it apart? Can you assemble it again?
COIL cast metal brainteaser from Hanayama Puzzles of Japan is a delightful and very tricky brain teasers. COIL consists of two odd-shaped metal pieces which resemble a rectangular shape with a hole through the center when together. The two pieces must be totally separated and then reassembled to solve the puzzle. Comes apart and reassembles with positioning and clever movements.