Every single piece in this puzzle is unique, no duplicates, for the perfect interlocking fit. We use extra thick, custom-developed European blue board and hand-crafted puzzle die cutting tools to prevent fraying or peeling puzzle pieces and dust. All our puzzles have cleanly separated pieces and our fine linen-structured, museum quality paper provides a glare-free puzzle image. We back this up with a lifetime warranty, no questions asked. Simply the world’s best puzzles for adults. Start connecting.