This model is a divider that fits inside the tstak box of dewalts DCF982NT impact driver.
Each of the circular divisions is 75mm deep and has a diameter of 30mm, it can hold the inbus bits for this impact driver and could potentially fit other impact tools too if they do not exceed the 30mm diameter.

The lid simply slides in place. The two long legs of the lid prevent it from sliding out of place when the tstak box is closed.
I did not need any glue to hold the divider box, friction was enough.