Adams Rite 4550R-01-121 4550 MS Deadlock Lever, Dark Bronze Anodized

Item #: 4550R-01-121 by Adams Rite

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In Stock $180.34 /each

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Adams Rite 4550R-01-121 4550 MS Deadlock Lever, Dark Bronze Anodized

Item #: 4550R-01-121 by Adams Rite

See reviews See reviews

In Stock $180.34 /each

SAVE UP TO 18.03

Buying in bulk


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  • MS Deadlock Lever
  • Housing: Aluminum casting is 1-3/8” wide x 7-1/2” long x 1” deep.
  • Easily Unlocks and MS Deadlock with Three Pounds of Downward Force
  • Lever: 3” long aluminum with end-return design offers comfortable grip to lock or unlock.
  • Spring-Loaded Lever Locks and Reloads with Upward Motion
  • Indicator: Words “LOCKED” in red letters or “OPEN” in black letters appear on white background when lock is thrown or retracted. Indicator is driven by lock bolt itself.
  • Indicator Signals Lock Status
  • Stop Clearance: Lever housing projects 11/16” forward of cylinder backset centerline. Depending on height of door stop and width of door/jamb gap, it may be necessary to modify the stop to clear the housing. For fin type stops, this is easily accomplished. Hollow stops may preclude use of lever.
  • Warranted Free From Defects In Workmanship And Materials Under Normal Use And Service
  • Compatible Deadlocks: Any MS® pivoted bolt deadlock including “Schoolhouse” versions can be fitted with the 4550 including MS1850S, MS1950, MS1837, etc. Derivative units such as 1870, 1870HM, or 1877 flushbolts (bolt into threshold) are also operable by the 4550 lever. Not compatible with MS+1890 Deadlock/Latch or with 7/8” backset locks.
  • Options: Available in three finishes to match anodized aluminum finishes. Can be ordered for left or right hand door, but is easily reconfigured in the field to accommodate either door swing.
  • Standard Package: Individually boxed with installation instructions, mounting screws, and drive pins for both single point and threshold bolt-equipped locks. Shipping weight: 1 lb.


Dark Bronze Anodized




End-Return Handle


Right Hand


1-3/4" - 2"

For Use With

MS1850S, MS1950, MS1837, etc.




Dark Bronze Ritecoat Paint

Color Code




BAA Qualified


Package Height


Package Length


Package Volume


Package Width


Lever/Knob Design

Flat Lever w/Return

Package Qty


Product Height


Product Length


Product Width


Rose/Escutcheon Design

Rectangle with Indicator



Finish Description

Dark Bronze Anodized

Product Type

Lock Part/Accessory

RH or LHR, 1-3/4" to 2" Door Thickness, 121 To Match 313 Dark Bronze Anodized
Easy unlocking of any MS Deadlock by approximately 3lbs. downward force on a 3 lever. Lever is spring loaded to horizontal relocks with upward motion. Indicator signals lock status. Can be installed in place of existing key cylinder or cylinder type thumbturn on inside of door. 4550 Deadlock Lever not compatible with 7/8 backset locks. Operation - Turn lever downward 90° to unlock. When released lever returns to horizontal. Turn lever upward 90° to relock. Key operation from outside is not affected. Clutching action prevents damage to internal components.