Parametric Project Box

One of two fully parametric project boxes, one with 4 screws to attach the lid, and one with 6 screws, for larger boxes. Otherwise the designs are identical. The lid has a lip which fits inside the bottom walls. These designs are public on Onshape.com. The links are:
4-hole box: goo.gl/ZdkVYM
6-hole box: goo.gl/v9E0Rr
You can view the designs, and copy them into your own Onshape workspace to modify them.

The parameters are:

Width, Length, Height: overall outside dimensions
LidHeight: H