Poor man pocket hole jig

[rendoman]

Hi all!
Just finished a sort of pocket hole jig for wood.
I used Iron scraps, a piece of square tube 30x30mm and a flat bar 60x60mm, 10mm thickness.
I drilled the holes 6mm (wooden spine), 19mm MDF (standard here), 20mm from edges.
Easy to use and to clamp, I will use for my next speaker.