CAST KEY PUZZLE MAGIC

This is a small puzzle with a big challenge. Can you separate the two keys and then reattach them?

The Cast Key is one of the first three puzzles released by Hanayama, back in 1983. The other two were the Cast Star and Cast ABC. The Key puzzle originated in Britain in the late 19th century and has ever since been intriguing puzzle fans around the World.

Comes with step by step illustrated instructions.
There is seemingly no solution to unlocking them.
No set up necessary, it's always ready.
Fun and frustration in a small box.