Description
The Adams Rite 4550L-01-121 is an aluminum lever trim for MS pivoted bolt deadlocks, designed for users who need easy, reliable interior operation of their door locks. This flat lever with spring-return mechanism and locked/open indicator replaces existing key cylinders or thumbturns, requiring only 3 lbs. of downward force to unlock.
This left-hand (LH/LHR) lever works with MS deadlocks including Schoolhouse versions, MS1850S, MS1950, and MS1837, plus MS flushbolt derivatives like the 1870 and 1877. It is not compatible with 7/8 inch backset locks or MS 1890/2190 models. Includes mounting screws, drive pins for single-point and threshold-bolt setups, and installation instructions. Contact E.D. Locks at sales@edlocks.com or 1-877-207-6067 for expert guidance on compatibility and installation.
