Sealed Waterproof Coatingfully Wrapped Waterproof Plastic Coating, Waterproof And Dustproof, Ideal For Outdoor Use Suitable For Indoor & Outdoorwide Applications - Perfect For Indoor And Outdoor Use Such As Lock Cabinet, Courtyard, Gate, Fence, Garage, Gym Locker, Shed Etc Wear-Resistant And Durableprecise Internal Structure, The Interlocking Part Between Lock Beam And Lock Body Is Very Thick, Anti-Pry The Locks Are All Wrapped In Wear-Resistant Plastic, Which Prevents Scratching And Is Quite Durable Multilayer Stacking Technique A Total Of 22 Layers Of Galvanized Locks Are Superimposed And Secured Through 8 Rivets After Impact, Fall, Collision And Other Experiments, The Locks Are Still Intact, Which Can Effectively Resist Violent Damage Safety Lock Cylinder12Mm Shackle Diameter Inside Lock, Positive And Negative Groove Structure Is Adopted Four Pin Cylinders Increase The Tooth Density And Enhance The Difficulty Of Cracking