Our Eco-Flex® Rubber Paver Tiles Characterized by the "dog-bone" or "Keystone" pattern, offer a patented full 4-way interlock design capability in a large 12 sqft. and 9.5 s tiles. This tile is recommended for all indoor and outdoor applications and is ideal for installations on a compacted gravel base. In areas where there are no edge or wall restraints, snap-edging or restraint bordering of some type may be recommended. (not necessarily required in all situations.) Ideal alternative to brick pavers Extremely fast & easy to install Safe, non-slip surface All season all weather durability.