Koch 6803201 Free Hanging Push Button Latch for 3/4-Inch to 1.1/4-Inch Thick Doors, Black
Black Free Hanging Push Button Latch should be used with outswinging wood or metal doors from 3/4-inch to 1-1/4-inch thick.  Latch has a free hanging handle. No Lock Out feature prevents accidental lock out.  There is a 1-3/4-inch mounting hole spacing and spring loaded strike.  All installation hardware is included.