Box frame screw structure blocks

Stack-able structure blocks for building a mini-scaffolding of solid structure blocks.I've made this to hold my car's reverse camera, the structure I've attached to my car's housing and at the end the CCTV.You can stack as many as you'd like. They are also pretty resistant, I've had these mounted under my car for a few months now.Size of one block:70x40x40mmRequires some glue between pieces for additional resistance!!