This is the 3rd version of my 3d printable wall mounted storage unit. it uses 2-3 commando strips to mount to any wall or flat surface. Print the wall mount and support arms at atleast 50% infill so it wont be likely to break in the future. This kit uses 8 fasteners to assemble it. you will need 4 1/4-20 Socket head cap screws with .625 in length to mount the arms to the wall mount and another 4 1/4-20 Socket HEad Cap Screws with .75 in length to mount the arms to the tool trays.