The blind holes prevent cracking and help to break down surface gasses of the brake disc/rotor to further improve braking under heavy load. Made in Europe and machined using a high quality alloy that is capable of running up to incredibly high temperature. These discs are intended for Road, light race, rally and track day use.When used with Greenstuff, Redstuff Ceramic or Yellowstuff brake pads, you will be hard pressed to find a better priced and quality standard sized disc/pad combo for your car. We try to respond to messages within 24 hours. If you do not receive a response within 24 hours please send us another message. Please be aware that some of our items are made to order and can carry up to a 14 day lead time. Information on lead times for all made to order items will be included in the Product Description. Upon receipt of your order you will be asked to sign for the goods received in good condition. This item is in the category "Vehicle Parts & Accessories\Car Tuning & Styling\Performance Braking\Performance Brake Discs". The seller is "wg_motorparts" and is located in this country: GB. This item can be shipped worldwide.