The Lincoln Guardian G644 Grease Fitting zerk is a high-quality grease fitting designed for automotive use. With a 45-degree angle and a 8mm x 1 size, this fitting is perfect for easy and efficient grease application. Manufactured by Lincoln Guardian, a trusted brand in automotive tools and supplies, this grease fitting is a reliable and durable addition to any shop's equipment and supplies. Ideal for grease guns and lubrication tools, this fitting is a must-have for any mechanic looking to keep their vehicles in top condition.