Norton Rixson 1ADJ Series Checkmate Heavy Duty Concealed Door Stop and Holder with Adjustable Slide Track ArmProfessional Concealed Door Control SolutionThe Norton Rixson 1ADJ Series Checkmate is a heavy-duty concealed door stop and holder engineered for high-traffic, heavy-abuse applications. This professional-grade unit features an adjustable slide track arm design with 110 maximum opening capability and accommodates doors with 1-3/4″ minimum thickness. The concealed mounting system provides both hold open and stop functions while maintaining clean door aesthetics in demanding commercial environments.Professional Features & BenefitsDoor Thickness Compatibility: 1-3/4″ minimum door thickness with factory consultation available for thicker door applications.Maximum Opening Range: 110 maximum opening for most applications (105 for center hung 30-36″ doors) with fully adjustable degree settings.Heavy-Duty Construction: Durable slider cam and shock block with heavy shock absorber spring providing 5-7 degrees compression before dead stop.Concealed Mounting Design: Hidden installation maintains clean door appearance while providing professional door control functionality.Adjustable Slide Track Arm: 1 3/16″ square channel design allows field adjustment to adapt to changing operational needs.Dual Function Operation: Combined hold open and stop functions in a single concealed unit for versatile door control.High-Security Options: Torx screws available for exposed fasteners in high-security area applications.Manufacturer Warranty: 2-year limited warranty for added confidence and protection.Technical SpecificationsANSI/BHMA: Certain Models ANSI/BHMA A156.8, Grade 1 CertifiedArm Specification: Slide TrackCommercial/Residential: CommercialDepartment: Door HardwareDoor Swing: Single or Double ActingDuty Level: Heavy DutyFasteners: Torx Screws OptionalGrade: Grade 1Hold Open Feature: YesMounting Method: ConcealedProduct Category: Door ControlsProduct Group: Door ControlsProduct Subgroup: Overhead Stops and HoldersProduct Type: Overhead Stops and Holders – Concealed MountSeries: 1ADJ SeriesSubcategory: ConcealedWarranty: 2 Year LimitedInstallation & OperationReview manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsRetail EstablishmentsIndustrial and Warehouse FacilitiesMulti-Tenant Residential PropertiesGovernment and Municipal BuildingsWhy Choose Norton Rixson Quality?Norton Rixson door control products deliver professional-grade reliability with heavy-duty construction featuring durable slider cam and shock block components rated for high-traffic, heavy-abuse applications. ANSI/BHMA A156.8 Grade 1 certification and UL listing ensure compliance with industry standards. Engineered for demanding commercial applications where dependable concealed door control performance is essential.