do you have aftermarket wheels? as they are only recommended for aftermarket wheels...
in which case contact them and get suitable ones for the OEM wheels.
The seller is being a bit misleading saying those nuts are suitable for all the standard Ford Focus wheels etc - reason being the aftermarket nuts have a much narrower cone where the nut contacts the wheel.
Correct 45 degree angled face but you'll only be getting 2 or 3mm of contact between the nut and wheel surface, look at one side by side with a Ford nut and you will see the Ford nuts have wider face to suit their wheels which have larger diameter than lot of aftermarket wheels.
Photo shows it better, shiny ring on each nut shows where they contact wheel surface (after-market nut used on an Oz wheel)