|It has been suggested that this article or section be merged into Pre-pre-block. (Discuss)|
|View static image|
|Number of cells||4|
|Year of discovery||Unknown|
Hook is a pattern which can be stabilised to make patterns such as hook with tail.
It alone evolves into a block in generation 2.
Hitting this with a glider in 2 positions (where if this was a block it would have produced a pi-heptomino) produces a middleweight spaceship.