Cryptex Security Box - Blue Marble Pattern Beautiful marble patterned design with solid hand polished brass components Durable construction with precision machined solid brass components and shatter proof polycarbonate spacer rings makes this well suited for heavy use as a security box. Perfect for use in Escape Room games, as gift boxes, puzzles, and treasure hunts. Anti lock picking feature with false notches make picking the lock next to impossible Mechanically-changeable code with up to 12 million possible combinations  no special tools or screws required