The LD-378 Zinc Alloy Tubular Lever Handle Lockset represents a step up in both style and security from traditional knob locks, delivering modern lever-style convenience in a retail-optimized blister pack format. Available under the USFLGE and CHUANG-QI-LOCK brand names, this tubular lever lockset features a sleek, ergonomic lever handle design that provides easy one-handed operation, making it an excellent choice for accessibility-conscious installations and contemporary interior designs. The zinc alloy die-cast construction ensures consistent quality, precise dimensions, and a premium feel that sets it apart from economy-grade alternatives. At the heart of the LD-378 is a robust steel internal spring mechanism paired with a precision brass 5-pin tumbler cylinder, delivering ANSI/BHMA Grade 2 security performance and EN 1906 compliance for light commercial and heavy residential use. The 8mm square steel spindle provides solid torque transfer and long-term durability, even with frequent daily operation. With an adjustable 60/70mm backset, compatibility with 35-50mm door thicknesses, and fully reversible handing, this lever lockset offers maximum installation flexibility across a wide range of door types and configurations. Each set includes 2-3 brass keys and is available in entrance, passage, and privacy function variants to suit different door requirements throughout a building. Packaged in clear blister packs with professionally printed display cards, the LD-378 is ready for immediate retail shelf placement. The packaging prominently showcases the lever handle, latch, strike plate, spindle, and keys, allowing customers to inspect the product quality before purchase. With five sophisticated finish options including Satin Nickel, Polished Brass, Chrome, Oil-Rubbed Bronze, and Black, retailers can cater to diverse customer tastes and design trends. Whether you are supplying hardware chains, building contractors, property management companies, or e-commerce platforms, the LD-378 lever handle lockset offers an outstanding combination of quality, aesthetics, and retail-ready presentation that drives strong sell-through and customer satisfaction.