4 ms·

Joining the thread to see where iron balls can be sourced. Some vendor on AliExpress? Those Lucky Iron Fish?

• lstodd 5mo ago
  I'd guess exact form wouldn't matter. Wrap a hammer in foil and beat up something rusty.
• dgacmu 5mo ago
  This might work with old iron dumbbells (or modern iron kettle balls if left unpainted). Your gym might hate you for it though.
• mhb 5mo ago
  Cast iron pan left outside for a day or two.