Metal 6-Piece Burr Puzzle (6 mm series)

A traditional 6-piece burr puzzle, beloved for over a century! With over 800 of different shapes for each of the six pieces, the plain-seeming exterior of these burrs belies the mysteries within.  While one may pickup and disassemble a simple burr in seconds, the toughest burrs flummox even hard-core puzzle lovers.  This broad range of challenges has kept burr puzzles in the forefront of puzzle collections for decades. About the Burrs: Diabolical Structure - The easiest of the burr puzzles.  With only 3 unique pieces, the solution can be found by non-puzzlers and curious children. Contains pieces (001, 256, 256, 256, 928, 928) Chinese Cross - Probably the most classic design, a good beginner puzzle with a variety of unique pieces.  Great start for a new collector.  Contains pieces (001, 256, 824, 975, 928, 1024) Six-Way Set - An interesting challenge, while making any one burr from this set is not difficult, can you find all 6 possible constructions?  Contains pieces (052, 792, 911, 82