Fraxel Dual, which is ideal for rejuvenating the hands is a non-ablative treatment. It offers two modalities of wavelength energies: 1550nm for deeper tissue and 1927nm to refine more superficial issues. Laser energy is still administered through long, microscopic beams of light. The objective is to apply specific amounts of heat to the dermis layer to trigger processes in the skin that create new collagen fibers. This is what enables the hands to achieve a firmer, smoother texture.
Web reference: http://www.finetouchdermatology.com/los-angeles-fraxel-dual/