Stanley Hardware S828-186 CD8821 Combination Security Padlock Astm Security Grade 3 Hardened Molybdenum Alloy Steel Shackle Resists Sawing And Cutting Attacks Dual Hardened Steel Locking Bolt System Resists Pry Attacks ASTM security grade 3 No keys required, you set your combination Hardened molybdenum alloy steel shackle resists sawing and cutting attacks Dual hardened steel locking bolt system resists pry attacks Snap fit cover seals lock from the elements