Cast Keyhole – Hanayama Metal Puzzle

The Keyhole consist of two similar looking “maze” plates, resembling the jagged edges like the teeth of a key, which are interlocked together in the starting position.
Object is to separate the two plates, via one of the openings on one of the plates.
At first glance it looks like two pieces of uneveness on a single plain, and has a three dimensional maze in these intertwined pieces.
The theme is “groove”
Designed by Finnish designer, Vesa Timonen.