This heavy-duty 70mm solid brass block padlock is ideal for shutters, containers and pairing with chains. The integrated hardened steel shackle leaves very little area to attack with hacksaws and bolt cutters, making it much harder for thieves to attack. The rustproof interior and high quality cylinder ensures it will operate for many years to come, even in harsh outdoor conditions. Solid brass body. Integrated shackle leaves very little contact space for attack with mechanical tools. Hardened steel shackle.