This is a clock divider with more outputs than you could ask for. It includes powers of 2 from 2 to 256, along with 3, 5, and 7. On top of that, there are 1.5 (3/2), 2.5 (5/2), and 3.5 (7/2). On these dividers, the half divisions are calculated when the incoming clock goes low.
The main clock input (on the bottom section) is normalled to the top three clock inputs. If nothing is plugged into the top three input jacks, they will receive the input connected to the main input.
To achieve more divisions, you can plug this module into itself. For instance, to divide by 14, plug the /2 output into the /7 clock input and monitor the /7 output.