I bought this for a custom strat I was building. I needed a custom pickup configuration of H+S, so I had to make my own pickguard.
This pickguard is of good quality plastic. Thickness is 2.15 mm. Top side is very glossy and comes protected with a plastic wrap. It comes with a shielding foil attached above the pot cavity area, which is nice.
I cut the holes with a hand jigsaw and filed the edges with a dremel tool. Not the most professional solution, but result was ok for my needs, and cutting was quite easy. Of course if you have access to some kind of milling machine - that would yield best results.