This is a wall mounting bracket for supporting square rod or tubing. It is fully customizable with one or two mounting holes. Customizable features: I would probably recommend 100% fill if you want it to be strong, but the design should lend itself to a lower fill if you don't need to support much force. Print without supports. The bracket in the picture was printed with ABS at 100% fill. I added the STLs just for reference - I would recommend customizing to suit your needs.I would probably recommend 100% fill if you want it to be strong, but the design should lend itself to a lower fill if you don't need to support much force. Print without supports. The bracket in the picture was printed with ABS at 100% fill. I added the STLs just for reference - I would recommend customizing to suit your needs.