Up cycled selvedge denim cropped jacket

Up cycled selvedge denim cropped jacket Has a partly exposed jaw string tie at bottom of jacket Raw cropped bottom hem Cool gray blue denim color. Has metal hook like things on bottom sides of jacket. They seem to be able to tighten or loosen as wanted. Not sure what they’re for. Good pre owned condition Seems to fit like a size medium Please check pictures for measurements and condition Feel free to ask questions