Engineered from high-quality metal, Dorman's Differential Pinion Shaft Lock Bolt effectively retains the pinion shaft to the rear differential. The Bolt is recommended for replacement when performing rear differential work or when replacing rear axle shafts. All Dorman products are engineered in the United States and backed by 100 years of automotive aftermarket experience. Our solutions are thoroughly tested and inspected, and if you experience any difficulty installing or using our parts, we have a dedicated technical support team of ASE Blue Seal certified professionals ready to help. To learn more about our quality and innovation, visit DormanProducts.com.