KEYED ALIKE locks, All locks open by one key, Each lock with 2 same keys. Indoor and Outdoor use, for Self storage, Storage units, Garages & Sheds, Trailers, Trucks, Fence, Farm, Pods, etc. #304 Stainless Steel body with Solid Brass cylinder, Rust resistant. Heat-Treated Stainless Steel Shackle (HRC50-55), Anti-Saw. Designed as a Key retain cylinder system, key remove when the lock well locked. High-security padlock designed for storage facilities, with 304 stainless steel lock body and brass lock cylinder, with brass key to ensure durability and anti-theft performance. The red appearance is eye-catching and easy to identify, the key retain system prevents the key from falling off, and the through-open design facilitates unified management, making it an ideal choice for self-storage , truck, trailer, container, fence and other scenarios.