The Venn Puzzle by Craighill is a very well considered puzzle.
This is the carbon black version that has a nitrocarburized finish.
Made up of three identical pieces of die cast stainless steel.
All together the puzzle weighs in at 1lb 10oz and it feels really quite weighty in the hand.
The aim is to take this apart and the reassemble. Taking it apart is the easy bit, putting it back together is another matter!
It comes with a brass display stand.