Cal-Royal LSDD Grade 3 Double Cylinder Deadbolt with Solid Brass CylinderThe Cal-Royal LSDD is a Grade 3 double cylinder deadbolt from the LSD Series, conforming to ANSI A156.2 Series 4000 Standard Duty requirements for reliable commercial and residential security. Built with a solid brass 6 pin "C" keyway cylinder, this deadbolt features an adjustable door thickness range of 1-3/8" (35mm) to 1-3/4" (45mm), an adjustable backset of 2-3/8" or 2-3/4", and a 1" throw with anti-saw pin for enhanced resistance to forced entry. Its tapered cylinder guard and metal insert turn freely under removal attempts, adding a layer of tamper resistance suitable for both commercial and residential door applications.Key FeaturesDoor Thickness Range: Adjustable 1-3/8" (35mm) to 1-3/4" (45mm) accommodates a wide range of standard door preparations.Adjustable Backset: 2-3/8" or 2-3/4" backset options provide flexibility for varied door prep requirements.Deadbolt Faceplate: Standard 2-1/4" x 1" faceplate packed with 1/8" plastic filler to convert to 1-1/8" wide door preparations.Bore Diameter: 1" bore for latch and 1-1/2" or 2-1/8" bore for lock housing to fit common door prep standards.Strike Plate: 1-1/8" x 2-3/4" square corner strike for secure frame engagement.Solid Brass Cylinder Construction: 6 pin solid brass "C" keyway cylinder standard, with optional keyways including Schlage E, Schlage C-K, Russwin D1-2-3-4, Corbin 59/60, Corbin-Russwin L4, Sargent LA-LB-LC, Falcon/Weiser E, Arrow A, Yale 8, Yale GA and Kwikset, and compatibility with Medeco, Assa, Kaba and Cal-Royal HSK High Security Cylinders.Tamper-Resistant Cylinder Guard: Tapered cylinder guard with metal insert turns freely under removal attempts to resist forced entry.1" Throw with Anti-Saw Pin: Adjustable latch bolt with anti-saw pin construction for added security against sawing attacks.ADA Ergonomic Thumbturn: Designed for ease of operation in compliance with American Disability Act ergonomic requirements.Re-Keyable Design: Re-keyable for master and construction keying, supporting flexible facility key management.Certifications & ComplianceANSI A156.2 Series 4000, Standard Duty Grade 3ADA (American Disability Act) Compliant Ergonomic ThumbturnLifetime WarrantyTechnical SpecificationsProduct Group: Mechanical LocksSeries: Chelsie LSD SeriesProduct Subgroup: Bored LocksetsKeying Type: Re-Keyable for Master and Construction KeyingKeyed: YesProduct Model: LSDBackset (Distance): 2-3/8 or 2-3/4 Adjustable, Round CornerProduct Function: Double CylinderDoor Thickness Range: 1-3/8" to 1-3/4"Product Category: Mechanical LocksDepartment: Door HardwareTypical ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsRetail EstablishmentsMulti-Tenant Residential PropertiesGovernment and Municipal BuildingsWhy Cal-Royal LSD?Cal-Royal LSD Series deadbolts deliver dependable Grade 3 performance backed by solid brass cylinder construction and a tamper-resistant cylinder guard designed to resist forced entry. Engineered with adjustable backset and door thickness ranges plus broad keyway compatibility, the LSDD is built for straightforward specification across commercial and residential door hardware projects.