Deck Lok Decking is manufactured by Royal Crown Limited in Milford, IN. Their patented connection system allows the hollow decking planks to lock together. Deck Lok Decking is made from 100% Virgin Vinyl and is available in Tan/Clay or Gray/Stone reversible planks. This products is covered by a limited lifetime warranty. Deck Lok decking was tested under the ESR-1051 Evaluations Service Report.