The 4550L-01-119 from Adams Rite is a MS Deadlock Lever Left Handed for MS1850A and MS1850S in Satin Black Anodized. The 4550L-01-119 MS Deadlock Lever works with the MS Deadlock with approximately three pounds of downward force on a 3″ lever whereas the spring-loaded lever relocks the device with an upward motion. The indicator is self-driven by lock bolt itself which indicates lock status. It can be installed in place of existing key cylinder or cylinder type thumbturn on inside of door. Its clutching action prevents damage to internal components. The 4550 Deadlock Lever is not found compatible with 7/8″ backset locks.
Adams Rite 4550L-01-119 MS Deadlock Lever Features
- Satin Black Finish: Provides a sleek and modern appearance that enhances the aesthetic of any door.
- Self-Driven Lock Indicator: The indicator is activated by the lock bolt, ensuring clear visibility of the lock status without additional mechanisms.
- Handed Operation: Specifically designed for left-handed use, making it ideal for left-swinging doors.
- Reconfigurable Handing: Easily adjust for LH or LHR handing operation to accommodate different door swings, offering flexibility in installation.
- Durable Aluminum Casting: Constructed from robust aluminum, the housing measures approximately 1-3/8″ wide x 7-1/2″ long x 1″ deep for lasting durability.
- Wide Compatibility: Compatible with MS1837, MS1850S, MS1850SN, MS1861, MS1950 Deadlocks and 1870 Series cylinder-operated Flushbolts, ensuring versatility.
- Suitable for Various Door Thicknesses: Designed for doors with thickness ranging from 1-3/4″ to 2″, catering to a variety of installations.
- Clear Lock Status Indication: Words “LOCKED” in red letters or “OPEN” in black letters appear on a white background for easy lock status recognition.
- Comfortable Grip Lever: The 3″ long aluminum lever features an end-return design for an ergonomic grip when locking or unlocking the device.
- Forward-Projecting Lever Housing: Projects 11/16″ forward of the cylinder backset centerline, ensuring accessibility and ease of use.
Detailed Specifications for Adams Rite 4550L-01-119
| Feature | Details |
|---|---|
| Satin Black Finish | Modern and sleek appearance |
| Self-Driven Lock Indicator | Indicates lock status based on the lock bolt |
| Handed Operation | Designed specifically for left-handed doors |
| Reconfigurable Handing | Can be adjusted for different door swings |
| Durable Aluminum Casting | 1-3/8″ wide x 7-1/2″ long x 1″ deep |
| Wide Compatibility | Works with various MS Deadlocks and Flushbolts |
| Door Thickness Compatibility | 1-3/4″ to 2″ doors |
| Lock Status Indication | “LOCKED” in red or “OPEN” in black |
| Comfortable Grip Lever | 3″ long aluminum lever with ergonomic design |
| Forward-Projecting Lever Housing | Projects 11/16″ from cylinder backset centerline |



















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