This two-piece Closure Bolt is for both  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 CP1 Closure requires a 1" diameter or a 3/4"x1" rectangular hole through the jamb. The two parts are supplied in a connected set for a quick grab out of the box and to ensure an equal number of matching parts supplied in each box.