【High Quality Material】These cap nuts are made of 304 stainless steel, which has anti-corrosion protection and high hardness, so these hex nuts will have a long service life, protect the end of the screw dirt and damage and allows use in both wet rooms and outdoors. 【Capped Hex Nuts】Capped hex screw nuts keep out water and other substances corrosives from penetrating, not only protect the end of the screw from dirt and damage, but also prevent injury to the open end of the screw, extending the service life of the screw. 【Wide Application】Perfect for professionals, hobbyists, craftsmen, repairers, etc. The universal nut is suitable for many fields such as mechanical engineering, building decoration and workshop, and is also used as automobile and motorcycle parts, machinery, furniture, etc. 【Easy to Sort】The nut kit is packed in a plastic storage box that can be easily resealed.