Used another type of 45 degree bracket that just snapped. So I made this one that has full length sides for more structure. Also the holes fit standard dry wall screws (Head size of 8 mm and thread size of 3.5 mm). These work very good for the purpose I designed them for which was connecting a table top to the legs of the table . But other than that these can be printed at an angle so that the layer lines don't make it weak.