Wolfrace Variation Bolts are used to open or close wheel stud pattern by 1-2 mm. For example, if you have a vehicle with stud pattern of four holes, 98mm between each hole and you want to fit wheels with a pattern of four holes, 100m between each hole - you can achieve this with variation bolts. Please note: You must tell us the make, model and year of manufacture of your vehicle and the Wolfrace alloy wheel style you have in the fields provided before we can process your order.