The 5.25" Keystone Retaining Wall Pins are essential for securing Keystone retaining wall blocks, ensuring stability and enhancing the overall integrity of retaining wall systems. These high-quality, weather-resistant pins are designed to work seamlessly with the Keystone interlocking pin system, offering maximum design flexibility. With a length of 5.25", these pins facilitate near-vertical and setback installations, making them perfect for a wide range of wall designs. Packaged in boxes of 100, these pins are ideal for working on retaining wall projects.