This challenging wooden lock can only be opened after navigating the different mazes that are found on the top and bottom of this round lock. Move the pins and rotate the two discs that are sandwiched in between the layers. An attractive made puzzle by Siebenstein-Spiele.

Based in Munster, Germany, Siebenstein-Spiele was founded in 1992. Although the company is mainly known for board games, Siebenstein-Spiele also makes many wooden puzzles, several of which have been designed by company founder Jrgen Reiche.

• See at Puzzle Master