Stainless Steel Beam-wrapped Padlock High Security High Anti-theft High Level Manufacture Firm Endurance 1.301# & 304# Material Grade Stainless Steel body.2.301# & 304# Material Grade Stainless Steel Shackle.3.Brass Cylinder.4.Three "S" Groove Type Brass Keys,Nickel Plated.5.Double Locking. High security Stainless Steel Beam-wrapped Padlock