DualSided Mechanical Security Lock Enhanced protection with dual fourteenkey keypads on both sides, combined with a plum blossom lock core. This design helps prevent lock picking and provides reliable, secure access. Strong and longlasting zinc alloy construction ensures durability, rust resistance, and wear protection. Dimensions: 5.6 x 1.7 inches (142 x 42 mm). No power required. Operates purely mechanically, with no need for keys or batteries, ensuring access at all times without maintenance or charging. Compatible with a wide range of door types. Suitable for panel thickness of 1.6 inches (40 mm) and lock thickness of 1 x 1 inches (25 x 25 mm) for straightforward installation. Practical applications: 1. Ideal for securing office doors where controlled entry is needed on both sides without relying on electrical systems. 2. for residential use, offering strong security for front or back doors without the risk of battery failure. 3. Suitable for storage rooms or workshops to protect valuable tools and equipment with dependable, mechanical locking. This lock provides a reliable, lowmaintenance security solution for a variety of entry points while maintaining professionalgrade protection and ease of installation.