  We provide an introduction to the concepts of holoraumy tensors, Lorentz
covariant four-dimensional "Gadgets", and Gadget angles within the context of
4D N = 2 supermultiplets. This is followed by the calculation of the holoraumy
tensors, Gadgets, and Gadget angles for minimal off-shell supermultiplets. Four
tetrahedrons in four 3D subspaces of the Holoraumy lattice space are found.
