Each screw is made with an injection mold. All polyetherketone (PEEK) screws are made extremely durable. The screws are able to withstand harsh environments. The screws are resistant to water and will not rust. PEEK screws are wear resistant, impact resistant, and radiation resistant. PEEK screws are burning resistant and are also resistant to organic/inorganic liquids like acids and bases. PEEK Screws have been used for electrical, medical, automotive, and aerospace industries. PEEK screws are light and offer tons of versatility.