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

https://telegra.ph/What-Wrap-Feels-Best-for-a-Handle-That-Gets-Used-Every-Day-09-06

Upgrade your reclaimed boxes and bags by adding sturdy wire handles. Use 2-3 mm galvanized wire for durability and thread it through 3-3.5 mm holes for a snug fit