Many different six-piece burrs are available.
Difficulty is subjective, but in our opinion it ranges from easy to extremely difficult.
Attractively boxed set contains the 42 notchable pieces which can be used to assemble the 314 different six piece burr puzzles which contain no voids. Instructions are included. A list of which six pieces should be used for each puzzle is provided as well as a separate list giving relative locations of the pieces but not the orientation or sequence of assembly. The box is currently made from Jarrah, a rich burgundy colored wood from Australia. The pieces are made from Chechen, a beautiful brown colored wood from Mexico.