The development of a saw-chain armed with diamonds cutting edges has till now not been able to bring a favourable cost-performance ratio to the hard stone cutting technology. The further development of this technology is intended to increase the durability of the cutting elements by at least 100 %. By using new carrying materials we want to enhance the durability of the flexible carrying material made of one piece by 300 %. The development of new materials which are harder than diamond is already achieved, but still not in practical using. This development should bring a further increase of the durability. Moreover, a suitable fixation of the new material on the cutting elements has to be found, as well as the fixation of the cutting elements on the flexible carrying material.