this is a surface mounted lock in its modified version.. (bevel bolt been removed) and fabricating an "extension bolt and bracket.
the extended bolt is 3/16" thick metal(at least).. the penetration on the floor is approximately 1 1/2". this is to guard door from force
entry by kicking from outside to forcefully open door. the lock can be open by the right key from outside thru its mortise rim cylinder.
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