Description: 100% Brand new,never been used Each rotor is drilled for GM 5 x 4.75'' w/ 7/16'' stud bolt patterns. Maximum diameter of 6.11" to fit rotor hat. .050x45 Degree Chamfer. 2.786" max register axle. Bolt Pattern: 5 x 4.75 in (5 x 120.65 mm) Minimum Rim Size: Must use 15" or larger rims Placement on Vehicle: Rear Professional installation in highly recommended(No instruction included) Fitment: .