Upgrade your reclaimed boxes and bags by adding sturdy wire handles. Use 2-3 mm...

https://mega-wiki.win/index.php/How_Do_I_Choose_Between_Galvanized_and_Stainless_Steel_if_I_Hate_Rust%3F

Upgrade your reclaimed boxes and bags by adding sturdy wire handles. Use 2-3 mm galvanized wire for strong, rust-resistant grips that last. Drill 3-3.5 mm holes for a snug fit that won't tear your materials