The object involves a mathematical space-spanning structure known as triamond. It is metachiral, having symmetry group I4332, containing rotations of order 2 and order 3, and also left-handed screw displacements of order 4, and right-handed screw displacements of order 3.
[ Smaller version | Set of 51 slotted triangles ]
Designed by Koos Verhoeff and Tom Verhoeff.