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 Silver, They're Engineered To Correct The Pinion Angle And Help Eliminate Vibrations In The Driveline.