Carbon Steel Material: Made of carbon steel, sturdy and durable, not easy to deform. The surface is made of planted zinc, rust-proof and corrosion-resistant. Self-locking design: The pin is designed with a self-locking ring, and the spring-loaded locking pins are structurally sound and reasonably constructed, which is very convenient to use and wont loosen with use. Many Uses: Great for table saw, lawn, gardening, agriculture, truck, boat, trailer or other locking applications. Content: 10 round carbon steel safety pins, total length: 45mm, diameter: 6 mm. Scope of delivery: 10 round carbon steel safety pins, total length: 45mm; diameter : 6 mm. Carbon steel. Material: Made of carbon steel, sturdy and durable, not easy to deform. The surface is made of planted zinc, rustproof and corrosion resistant. Self-locking design: The pin is designed with a self-locking ring, and the spring-loaded locking pins are structurally sound and reasonably constructed, which is very convenient to use and wont loosen when using. Wide Uses: Ideal for table saw, lawn, gardening, agriculture, truck, boat, trailer or other locking applications.