milwaukee packout corner brackets

As a tradesman I needed my packout boxes formed to what my needs are, so I made corner brackets to give me a stable anchor point and to hide the bolts from the outside to be able to mount things on the inside of the box! this will also offset the corner angles to give a flat mounting surface! holes are slotted to allow for adjustable mounting!I built this box for fire alarm this holds 2 m18s in series to give me 120v on the inverter so i can power equipment up on new construction sites, hdt tool mounting and accessory attachments!