The LD-343 jimmy-proof vertical rim deadbolt lock is a surface-mounted security lock engineered to resist forced entry on apartment doors, residence entry doors, and commercial openings where maximizing resistance to prying and jimmying is a priority. Unlike a standard horizontal deadbolt, the LD-343 uses a vertical interlocking bolt design in which the bolt and strike engage along a vertical axis, so that an attempt to pry the door away from the frame is resisted by the interlocking geometry rather than by bolt shear strength alone. The lock body is constructed from hardened steel with a zinc alloy housing, and the interlocking bolts are hardened steel to resist cutting, sawing, and deformation under attack. A brass 5-pin tumbler cylinder provides keyed security, and a steel mounting plate distributes force across the door surface to reinforce the installation.

With a body measuring 100x70mm and a bolt throw of 20mm, the LD-343 delivers substantial locking engagement in a compact surface-mounted footprint. The cylinder diameter of 32mm accommodates a robust pin tumbler mechanism, and the lock fits door thicknesses from 35mm to 50mm using four surface-mount screws for straightforward field installation on both wood and metal doors. The vertical bolt design is particularly effective on outward-opening apartment doors, where the exposed hinge side can otherwise be vulnerable, and the surface-mounted installation avoids the need to mortise the door, making it well suited to retrofit and security upgrade projects on existing doors where minimal modification is desired.

The LD-343 is offered in brass, chrome, satin nickel, bronze, and black finishes to coordinate with adjacent hardware, and keyed-alike and master key options are available to support multi-unit residential and commercial key management. Each lock meets CE, ISO 9001, and ANSI/BHMA quality standards and ships in individual color boxes complete with mounting hardware and keys for straightforward field installation. With a minimum order quantity of 200 sets and a production lead time of 15 to 25 days, the LD-343 provides door hardware distributors, security contractors, and property managers with a high-value, attack-resistant deadbolt solution for both retrofit security upgrades and new construction projects where dependable forced-entry resistance is essential.