Specifications ? Size : 5/16 x 2-1/4 ? Material : Carbon steel ? Color : Silver ? Quantity : 10 Packs Features ? Rust & Corrosion Resistant : Made of high quality carbon steel material, zinc plated resists corrosion, durable and sturdy, suitable for outdoor long-term use; ? Secure Hold : These spring locking pins are structurally strong, wil not loosen during use. Spiral design makes anchor relocation and removal easy. Applications ? Great for table saw, lawn, gardening, farming, truck, boat, trailer or other locking applications. Note ? Manual measurement, error 1-3cm, depending on the actual situation, please understand; ? You can get the most friendly customer service, please feel free to contact us if you encounter any problems during use, 90 days free return or refund.