Fangrui Product Details Twist Lock Fasteners Are Made From Marine-grade Nickel-plated Brass, Which Makes Them Extremely And To Withstand The Harshest Marine Environments. The Included Mounting Screws That They Remain Strong And Rust- For A Longer Period Of Time. The Kit Comes With 25 Sets Of Marine-grade Twist Lock Fasteners And 50 Pieces Of Mounting Screws. Our Provided Parts Make Sure Your Fasteners Are Securely Installed, So You Can Relax Knowing Your Canvas Stay Put. The Canvas Twist Lock Fasteners Are Designed To Provide A Secure And Tight Lock, So You Can Be Sure That Your Fasteners Remain In Place Without Any Accidental Loosening. This Protects Your Marine Canvas Snaps And Fasteners, So You Can Enjoy Your Boat With Peace Of Mind! Also Known As Fasteners And Window Eyelet Fasteners, Turn Button Twist Lock Fasteners Are A Simple And Effective Solution For Your Fastening Needs. Apart From Securing Canvas Eyelets, These Versatile Canvas Fasteners Can Be Applied For Tvarious Outdoor Applications, Such As Boats, Sailboats, Rvs