Comp Engineering Differential Wedge Plates (MOC7025)2 DEGREE WEDGE PLATES (PAIR) 2 Pinion Angle Change Part Number: MOC7025 Used to adjust pinion angle or change traction bar angle on leaf spring equipped cars and trucks Allowspinion angle change in 2 increments Made from 6063 T5 aluminum, they won't crack like cast zinc Interlocking ribsallow plates to be stacked without sliding and eliminate unwanted pinion angle change Two per package