10 Sets QD Boat Canvas Snaps Upper Part Lower Part Plated Brass for Boat RV Canvas Canopies Yacht Ideal for use on boats, yachts, trailers, RVs, guitars, bags, and medical , these canvas fittings provide a quick and secure fastening solution for tarpaulins, spray hoods, bimini tops, and canopies.Commonly used as marine trimming hardware, this snap system offers a method for connecting fabric covers and enclosures.The upper part is made from nickel-plated brass, providing good corrosion resistance suitable for marine environments.It features a standard size of 20x15mm and has a round ball head design that works with compatible lower parts.The finish is shiny and under regular use conditions.The lower part consists of a screw base made from stainless steel 316 with a ball-end design.Available in thread lengths of 10mm, 16mm, and 22mm, it uses an M4 thread and is built to withstand oxidation and rust in outdoor settings.This component is designed to securely attach to surfaces where drilling is possible, stable engagement with the upper snap.This set is suitable for marine applications such as boat covers, awnings, and windshields, and can also be used in automotive, musical instruments, and other industrial contexts requiring fasteners.Package Includes: 10 pcs snap button fasteners (upper part) 10 pcs lower screw parts