This topic seems to be asked a lot.
I am very new to blender, so I am still learning the in's and out's. I am trying to use the small cube to cut out a section of the latch, however, each attempt instead removes the latch and leaves the cube. I have tried the three recommended solutions of eliminating duplicate vertices, recalculating the normals, and making sure the geometry is all closed up. Still, even with those checks, when I try to use the boolean difference modifier, it doesn't work properly.