Brink s 60mm Promax Security Stainless Steel Discus Padlock. This heavy-duty lock is constructed of a durable stainless steel body to resist corrosion and is enhanced by a chrome-plated hardened steel shackle for an increased cut resistance. The discus padlock is equipped with a 4-pin brass tumbler for pick pry and drill strength. It is weather-resistant and perfect to use indoors or outdoors all year long. As a global leader in security-related products and services the Brink s name is synonymous with top quality merchandise A Trusted Name in Security since 1859.