Smart Nails are designed and constructed to mark both living wood (trees) and round timber and for all kinds of wooden products and semi-products. Marking means that each wooden object gets a unique code and, if necessary, additional markings or properties which are entered into the Smart Nail. Smart Nails are mainly made of a material similar to wood (cellulose and/or binding agent). The design enables the Smart Nail to penetrate the wood along the fibres with minimal force. They contain a unique identification code and have available free memory dedicated to entering random data. They also use radio waves to communicate their identification codes and other data stored in the memory.