The DOT Durable Cap 93-ZN-10128-1U is a pack of 100 medium-sized stainless steel snap fastener caps made from marine-grade 316 stainless steel. Featuring a short 11/64 inch barrel design, these caps offer strong snap action and reliable holding power without needing pre-punched holes, thanks to their self-piercing ability. Designed for durability in tough environments, they resist corrosion effectively, making them ideal for upholstery, marine canvas, boat covers, awnings, tents, umbrellas, gear bags, and other outdoor fabrics. Their heavy-duty construction and fabric-piercing feature suit a wide range of industrial and outdoor uses where a secure, corrosion-resistant snap cap is needed.