The MS1861 Series MS® Bottom Rail Deadbolt provides maximum security with MS deadbolt over-center/pivot locking mechanism. It utilizes hardened steel bolts for the limited space of ultra-narrow stile doors. Using the same over-center/pivot locking mechanism as the basic MS® deadbolt, the MS1861 lies horizontally in the bottom rail of ultra-narrow stile doors which have insufficient vertical space for a lock, and tempered glass doors which have no stile at all.

The MS1850 Series Deadlock utilizes a laminated stainless steel bolt, activated by a pivot mechanism to provide maximum security for a single leaf narrow stile door. A huge bolt of laminated stainless steel, nearly three inches long, activated by an uncomplicated pivot mechanism, has made this basic MS Deadlock the standard of the narrow stile door industry.