The LD-377 Zinc Alloy Cylindrical Knob Lock is a retail-optimized door lock solution delivered in eye-catching blister packaging designed for maximum shelf appeal. Available under multiple trusted brand names including BestValue, CHUANG-QI-LOCK, and USFLGE, this cylindrical knob lock is engineered for entrance door applications with keyed access. The red/white/blue blister card packaging not only protects the product during shipping and handling but also clearly displays the lock, keys, and mounting hardware, making it an ideal choice for hardware stores, home improvement centers, and retail distributors. Constructed from high-quality zinc alloy die-cast knob and rose, the LD-377 offers excellent strength, dimensional accuracy, and corrosion resistance at an accessible price point. The robust steel internal mechanism ensures years of smooth, trouble-free operation, while the brass 5-pin tumbler cylinder with nickel silver pins delivers dependable security and smooth key insertion and turning. Each lock comes with 2-3 brass keys and supports entrance, passage, and privacy functions, providing versatility across a range of residential door applications. The adjustable 60/70mm backset and compatibility with 35-45mm door thicknesses make installation straightforward for both professional contractors and DIY homeowners. Designed with the retail market in mind, the LD-377 blister pack lock offers outstanding value for hardware distributors and building supply chains. The clear plastic blister allows customers to see the product quality firsthand, while the printed backing card provides essential product information, installation instructions, and brand identity. With five popular finish options including Polished Brass, Satin Nickel, Chrome, Black, and Antique Brass, retailers can stock a comprehensive range to match diverse customer preferences. The compact packaging optimizes shelf space and reduces shipping costs, making this lockset a high-margin, fast-turning SKU for any hardware retail operation.