The product is a set of replacement adjustment knobs with screws for the NordicTrack Ski Machine model. These knobs are designed for home use and are ideal for gym and training activities. The brand, NordicTrack, is known for producing high-quality fitness equipment, making these replacement parts a reliable choice for maintaining and repairing your ski machine. Perfect for those looking to keep their NordicTrack Pro ski machine in top condition for a smooth and effective workout experience.