20mm pole bracket for filament storage box

This is a bracket I used to make a filament dry box out of a plastic storage container (Sterilite #1925) and a 20mm dia. metal pole (left over from a shelving unit). Unlike the other rod brackets I've seen here, these are designed to mount with screws going from the outside in, rather than from the inside out (which wouldn't work very well going into plastic this thin).