Maximum Security Post Padlock * Laser welded stainless steel case and interior construction * Triple plated case hardened steel shackle * Restricted key profile with factory controlled manufacturing of additional keys * Key removable only in locked position * The cylinder has no spring-loaded parts to view or malfunction through wear, dirt, moisture, corrosion or freezing * Detainer disc cylinder well known for resistance to picking * Each lock supplied with 2 nickel silver keys (additional keys available extra)