The TwoBlock type system is based on the same framework as MuirMcNeil’s TwoBar, TwoBit, TwoPoint and TwoPlus collections.

TwoBlock comprises four complete typefaces, TwoBlock A, B, C and D, and two related sub-component typefaces, TwoBlock E and F, in which the horizontal and vertical strokes of TwoBlock D are implemented separately. Every typeface in the TwoBlock family has been drawn in nine weights.