The LD-374 steel multi-point door lock mortise system is a heavy-duty security solution engineered for double doors in residential, commercial, and institutional settings. At its core is a robust steel lock case standing 200-250mm in height, housing a precision mechanism that engages multiple locking points simultaneously when the key or handle is turned. Available in 3-point, 5-point, and 7-point configurations, these systems distribute locking force across the full height of the door, dramatically increasing resistance against forced entry compared to single-point deadbolts. The locking hooks and bolts are forged from hardened steel and engage with stainless steel striker plates embedded in the frame, creating a rigid interlock that withstands significant lateral and vertical loads.

Each LD-374 system is equipped with a brass 5-pin tumbler cylinder in the widely compatible euro profile format, available in 30/30 or 35/35 cam dimensions to suit various door thicknesses and handle configurations. The backset can be specified at 35mm or 45mm, accommodating both standard European and international door preparation standards. The zinc alloy faceplate extends the full locking length of 200-2200mm, providing a clean architectural finish while protecting the internal mechanism. Door thickness compatibility ranges from 40mm to 60mm, covering the majority of solid wood, engineered, and composite door constructions used in modern buildings. The black powder-coated lock body resists corrosion and abrasion, while the silver or nickel faceplate offers a contrasting accent that complements contemporary hardware aesthetics.

Flexibility is central to the LD-374 product line. Customers can specify the number of locking points, backset dimension, cylinder profile, and faceplate finish to match project specifications exactly. Keying systems can be configured as keyed different, keyed alike, or master key systems to support hierarchical access management in multi-unit residential or commercial buildings. The brass tumbler cylinder provides smooth key operation and is resistant to picking and drilling when combined with security pins. Every lock undergoes cycle testing to verify mechanical endurance and is certified to CE, ISO 9001, and EN 12209 standards, ensuring compliance with European construction product regulations.

As a wholesale supplier, we offer the LD-374 at competitive prices ranging from $10.00 to $50.00 per set, depending on the locking point count, cylinder specification, and faceplate finish. The minimum order quantity is 100 sets, with mixed orders across related SKUs fully supported to streamline procurement for distributors and contractors. Each set is packaged individually in a color box containing the lock case, cylinder, keys, faceplate, and striker plate, with 5-10 sets per carton for efficient shipping. Samples are available upon request, and our standard production lead time of 20-30 days ensures dependable delivery for projects of any scale.