For anyone looking to create a unique outdoor living space, Unilock offers the essential elements of design with the most innovative products found anywhere in North America. Our internal standards for manufacturing paving stones and retaining walls far exceed North American and world-wide industry standards and we've been providing a Lifetime Guarantee and backing it up with customer service longer than anyone else! The structural integrity of each stone is guaranteed. Unilock handles clients from Connecticut, New Jersey, New York, Pennsylvania, Massachusetts, Rhode Island, New Hampshire, Vermont and Maine. Unilock can be contacted toll-free by calling (888)-UNILOCK.