Cal-Royal EDD400 Grade 3 Double Cylinder Deadbolt with Hardened Steel PinThe Cal-Royal EDD400 is a Grade 3 double cylinder deadbolt from the Chelsie ED Series, engineered to conform with ANSI A156.2 Series 4000 standards for commercial and residential door security. Featuring an all-metal body and cylinder construction with brass exterior parts, this deadbolt delivers a full 1″ throw with a hardened steel pin that resists saw cutting. It fits doors from 1-3/8″ to 1-3/4″ thick and includes a 2-3/8″ or 2-3/4″ adjustable backset with round corner strike for versatile installation on wood and metal doors.Key FeaturesDoor Thickness Compatibility: Fits 1-3/8″ to 1-3/4″ doors for broad application across standard commercial and residential door types.Adjustable Backset: 2-3/8″ or 2-3/4″ adjustable backset with 1″ x 2-1/4″ round corner standard; square corner and drive-in adjustable backset also available for flexible installation.Heavy-Duty Deadbolt Construction: Full 1″ throw deadbolt with a hardened steel pin prevents saw cutting for enhanced security against forced entry.All-Metal Construction: All-metal body and cylinder construction with brass exterior parts provides exceptional durability for demanding applications.Reversible Handing: Reversible design accommodates both left and right handed doors, simplifying stocking and installation.Re-Keyable Cylinder: Kwikset keyway is re-keyable for master and construction keying; Weiser and Schlage “C” keyway available on special factory order.ADA Ergonomic Thumbturn: Ergonomic thumbturn design supports ADA (American Disability Act) accessibility requirements.Strike Options: 1″ x 2-1/4″ round corner and full lip strike standard, with square corner option and an optional 1-1/4″ x 3-5/8″ security strike with 3″ screws available for added reinforcement.Certifications & ComplianceANSI A156.2 Series 4000, Grade 3ADA (American Disability Act) Compliant Thumbturn5 Year Finish Warranty25 Year Mechanical WarrantyTechnical SpecificationsProduct Group: Mechanical LocksSeries: Chelsie ED SeriesProduct Subgroup: Bored LocksetsCommercial/Residential: CommercialKeyed: YesProduct Model: EDD400Backset (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 BuildingsIndustrial and Warehouse FacilitiesWhy Cal-Royal EDD400?Cal-Royal EDD400 deadbolts deliver dependable, Grade 3-rated security backed by all-metal body and cylinder construction with brass exterior components. The hardened steel pin and full 1″ throw provide added resistance to forced entry, making this deadbolt a solid choice for demanding commercial and residential applications where consistent, professional-grade performance matters.