Enhance the security of your doors with this high-quality Mechanical Lock Set, featuring a robust alloy lock case designed for both indoor and outdoor use. Crafted from premium zinc alloy with a waterproof finish, this lock combines durability with reliable protection, making it an excellent choice for safeguarding your property. Its hardened casting through special cold rail processing and chrome-plated surface ensure resistance against violent damage while maintaining an elegant appearance. Key Features: · Premium Alloy Lock Case: Constructed from high-quality zinc alloy with a waterproof design, providing long-lasting durability and reliable protection against the elements. · Hardened Cold Rail Processing: The lock case undergoes a special cold rail hard casting process, enhancing strength and resistance to physical damage. · Chrome-Plated Surface: Finished with exquisite chrome plating, offering both aesthetic appeal and added corrosion resistance for extended use. · Effective Security: Designed to withstand violent impacts, increasing the safety of your doors against forced entry. · Versatile Application: Suitable for both indoor and outdoor doors, accommodating various door types and environments. · Adjustable Password Security: Features a 2-4 digit password system, allowing customizable and secure access without the need for batteries. Specifications: · Product Model: 38D · Panel Material: Zinc Alloy · Password Length: 2-4 digits (non-repetitive, non-sequential) · Applicable Door Thickness: 10-60mm · Applicable Door Type: Indoor and Outdoor · Waterproof Design: Yes · Battery-Free Operation: Yes · Center Distance of Lock Tongue: Standard 60mm · Lock Size: Approximately 107 x 43 x 20mm (4.2 x 1.7 x 0.8 inches) Package Includes: · 1 x Mechanical Lock Set · 1 x English Manual · 2 x Installation Packages This mechanical lock set provides a secure, battery-free locking solution with easy-to-change password functionality, ensuring flexible and convenient use. Its sturdy construction and waterproof properties make it ideal for protecting various door types, from household entrances to outdoor gates, delivering dependable security that lasts.