Unilock, a family-owned and operated business, originally introduced the paving stone to North America in 1972. Backed by fam ... ily values and a commitment to quality, Unilock has grown to become the premier manufacturer of paving stones and retaining walls. Traveling the globe in search of inspiration, Unilock strives to stay on the leading edge of design and manufacturing innovation, to reflect the evolving needs, wants and sense of style of its customers. Locations Boston • Buffalo • Chicago • Cleveland • Detroit • Milwaukee • New York • Toronto read more