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.