This joiners toolbox project works great for all kinds of work. I’ve made the third toolbox and this one will be my carry out box to the job site. It carries even my drills and with all tools loaded, it weights about 40lbs.
I used 9/16” thick pine wood throughout the box. The internal boxes are 5/14” thick as Paul Sellers suggested in his shop drawing. The only difference in this version is that the top lid runs all the way out to the skirt. What I’ve done is, I’ve glued up a filler piece at the hinge side of the skirt and hinged right on it.