Designed to match the Corvette C7 button plate using Sparco P310 wheel used in iRacing
The holes are designed to allow these inserts to be installed so it easy to bolt the front & rear plated onto the enclosure.
http://www.ebay.ca/itm/Black-Bakelite-Insert-Brass-M3-Thread-Insulated-Female-Standoff-Spacer-OD-8mm-/131635444957?var=&hash=item1ea6157cdd:m:mto3XQi5aCzBaVZWyHCSYQg
I sell the front & rear plate for this enclosure in aluminium, stainless steel & carbon fiber.
Contact me at simracingengineering@gmail.com