They are custom machined from billet steel, and all holes are drilled on a mill to ensure accuracy. Finish is either raw steel if you want to paint them yourself or zinc coated for rust protection.
They are pricey, but there is quite a bit of time involved in manufacturing them. If there is a need I will also manufacture them in 5-stud configuration - but this will only be to order.
ORE member price $300 + GST or zinc coated $315 + GST
There is a little more information at:
http://www.4wdstuff.co.nz/products.html
