MANUFACTURER: LC IndustriesSKILCRAFT solid brass case padlocks are made to stringent US Government standards, AA59486 and AA59487, offering superior protection.KEY FEATURES:5pin cylinder, Bumpstop Advanced Cylinder Technology, resists tampering from lock bumping attacks.Solid brass body provides greater corrosion resistance.Lock body measures 11/2 or 13/4.Key retaining with dead bolt locking construction.9 chain included on most types.Keying options: Keyed Different, Keyed Alike, Master Keyed, and Grand Keyed depending upon NSN.All locks stamped US or US SET.