The 67,000 data points that define the surface of the Keyed Brick model is the culmination of the creation and placement of constantly changing profiles. There are two sets of keys extending out of the top and two sets of locks recessed into the bottom. The closed end on the left has recessed locks and the open end on the right has extended keys. Each set of key threads engage all surfaces of its mating set when they rotate into of their terminal position.
These sets of key threads engage by rotation. The bottom threads in Fig. 2 on the left all engage in one rotation. The top sets in Fig. 3 on the right have separate axies so each one has its individual engagement with another set on separate bricks.
Fig. 4 is a top view of a key brick rotating into position on a wall. Its bottom lock sets are engaging with top key sets of two other bricks. Brick X with its axis A is being rotated into position. This is the same picture for adding bricks.
Fig. 5 is a side view of a keyed brick wall highlighting the axis of rotation for those bricks to engage. Note how the reference brick X is surrounded. It first engages at A, then B and more are added to that layer. On the next layer, C connects with the top right half and D connects with the top left half completing the engagement of reference brick X. The two bottom E and F were the starting layer.