Pinion Suspension Axle HD Shims Leaf Wedge Lift 2.5 Degree Angle Correction. Lift Height Pinion Axle Shims. Included Hardware 2.5 Degree Shims. Made From Billet Aluminum And Anodized Black, They're Engineered To Correct The Pinion Angle And Help Eliminate Vibrations In The Driveline.