Wooden angle brackets | Right angles for fixing & gluing

Simple right angles with cutouts at the corners and holes for attaching clamps or clips.
I use the angles for all sorts of things. Since they can be milled quickly and easily, I have a whole stack of them, which makes clamping and gluing much easier.
So far I've milled the angles from 15 mm and 19 mm birch plywood, which is completely sufficient for my purposes.