6", Zinc Plated, Heavy Metal, Security Bolt, Concealed Screws, Can Be Used For Commercial Or Residential Applications, 50% Larger Bolt & Is Padlock Ready, Recommend Using A Disk Lock But Most Padlocks Can Be Used, Easy Installation On Sheds, Gates, Storage Units, Barns & Garages, Flush Mount To Door & Jamb, Protects Padlock Shackles & Hasp Staple Plate From Bolt Cutters, Tamper Proof.