DF2 - DoorFast 2-piece Closure
This two-piece Closure Bolt is for 2 3/8 and 2 3/4" backset doors with jambs up to 1 1/4 thick, right or left hand swing. It can be used on interior doors and exterior door to eliminate sag and to secure the door from manufacturing through installation.
the DF2 Closure requires a 1" diameter or a 4"x1" rectangular hole through the jamb. The two parts are supplied in a connected set of installation and ensure an equal number of matching parts supplied in each box.