Unilock classic pavers are part of our original line-up of pavers that have stood the test of time in both design and performance. Unilock classic pavers are manufactured using a high compressive concrete mix that produces a concrete paver up to 2.5 times the strength of poured or stamped concrete. That's why we offer our Lifetime Guarantee on each and every stone we make. Choose from a wide range of standard sizes and colors. When choosing a classic paver for your design, you may also want to consider incorporating Unilock Select pavers to accent or border your project.