Medeco 11R50 Maxum Single Cylinder Deadbolt, DL Keyway Grade 1 High Security Deadbolt LockThe Medeco Maxum Single Cylinder Deadbolt (Model 11R50, DL Keyway) is a premium high security deadbolt engineered for environments demanding superior protection against forced entry and key-based attacks. Featuring Medeco 4 (M4) locking technology, this heavy duty deadbolt is constructed with a solid 1″ hardened steel bolt and heavy-gauge tubular steel housing, and fits doors 1-3/8″ to 2-1/2″ thick with a standard 2-1/8″ crossbore and 1″ edge bore (ANSI A115.13 prep). Certified to ANSI/BHMA A156.36 Grade 1 and UL 437 listed for drill and pick resistance, it is the top choice for both residential and light commercial applications.Key FeaturesDoor Thickness Compatibility: Fits doors 1-3/8″ to 2-1/2″ thick for broad residential and light commercial installation flexibility.Solid 1″ Hardened Steel Bolt: Constructed with a solid 1″ hardened steel bolt and heavy-gauge tubular steel housing for maximum forced-entry resistance.Steel Shroud Protection: Steel shroud over the bolt resists ice-pick attacks and wrenching for enhanced physical security.High Security Strike Plate: Includes a high security strike plate with 2″ screws that anchors to structural framing for maximum resistance to kick-in attempts.Medeco 4 (M4) Key Control: Patent-pending cylinder technology prevents unauthorized key duplication, including protection against 3D-printed key blanks, with angled key cuts and fore/aft pin placement to significantly increase key combinations.Drill & Pick Resistance: Strategically placed hardened steel inserts provide drill protection; M4 cylinder design delivers bump and pick resistance.Master Keying Capabilities: Compatible with Medeco M4 master key systems, including M4 BiLevel and M4 CLIQ for large, scalable deployments.Configuration Options: Available as single cylinder, double cylinder, or captive key deadbolt; can be ordered with various Medeco lock cylinder technologies to suit specific security requirements.Architectural Finish Options: Available in 14 finishes including Bright Brass (05), Satin Brass (06), Antique Brass (09), Satin Brass Blackened (10), Bright Bronze (11), Satin Bronze (12), Oil Rubbed Bronze (13), Bright Nickel (18), Satin Nickel (19), Antique Nickel (20), Black (22), Dark Bronze (24), Bright Chrome (25), and Satin Chrome (26).Certifications & ComplianceANSI/BHMA A156.36 Grade 1 CertifiedUL 437 Listed for Drill and Pick ResistanceBHMA A156.30 Certified No Unauthorized Key DuplicationTechnical SpecificationsSeries: Maxum Residential DeadboltCylinder Technology: Medeco 4 (M4)Pinning: 5 or 6-PinKeyway: DL KeywayCertification: UL 437 Listed; ANSI/BHMA A156.36 Grade 1 (M4)Bolt: 1″ solid hardened-steel bolt in heavy-gauge steel housingDoor Thickness: Fits doors 1-3/8″ to 2-1/2″ thickDoor Prep: Standard 2-1/8″ crossbore, 1″ edge bore (ANSI/BHMA A115.13)Construction: Solid-brass cylinder construction with hardened steel insertsWarranty: 2-year manufacturer’s warrantyTypical ApplicationsHigh-End Residential HomesApartments and CondominiumsRetail StorefrontsOffices and Professional SuitesMulti-Tenant Residential PropertiesLight Commercial Facilities Requiring Grade 1 SecurityAnywhere a High Security Deadbolt with Key Control is RequiredWhy Medeco?Medeco Maxum deadbolts deliver professional-grade security through a combination of a solid 1″ hardened steel bolt, heavy-gauge tubular steel housing, and M4 cylinder technology rated to ANSI/BHMA A156.36 Grade 1 and UL 437 standards. The patent-pending key control system including protection against 3D-printed key blanks and compatibility with M4 master key systems makes the Maxum an engineered solution for demanding residential and commercial applications where dependable, certified performance is essential.