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Using the same overcenter/pivot locking mechanism as the basic M.S.® deadlock, 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 hardened steel cylindrical bolts allow simple drilled strike holes of a relatively small size to minimize the nuisance and danger presented by some threshold strikes in collecting debris.
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