brace member when the lock strike plate assembly is mounted in a door structure in the manner illustrated in fig4 as illustrated in fig4 the keeper plate 2 mounts on the facing of the door jamb 12 and is fastened to the facing by screws 11 extending through screw holes 8 formed in the keeper plate 2 above and below the passage hole 9 of the assembly the lock bolt housing 3 is inserted in a recess such as a cavity or hole 13 which is formed by the carpenter in the door jamb 12 and the brace member 7 extends through the door jamb and into the adjoining more sturdy wall supports 14 when the keeper plate assembly 1 is to be mounted in a door jamb structure such as is shown in fig4 the carpenter drills a hole 15 through the door facing 12 and continues the hole as a cavity 15a into the internal wall supports studs 14 the cavity 13 in door facing 12 is chiseled out of the door facing about the bore 15 and a shallow recess 16 is formed in the facing about the cavity 13 these settings are sized and shaped to conform to the sizes and shapes of the brace member 7 lock bolt housing 3 and strike plate 2 the strike plate assembly is then inserted into the settings by hammering if necessary to seat the assembly tightly into the door frame structure and screws 11 are inserted through screw holes 8 into the door jamb 12 to hold.