3/8 Inch 10 mm 2pcs Screw pin anchor shackle is made of 304 stainless steel, which is highly resistant to rust, corrosion, and moisture. It is also resistant to acid and alkali, and has a glossy, bright surface. The screw pin anchor shackle is designed to be strong and durable, and is used for coupling chain and wire rope. They're perfect for camping, hiking, and other outdoor sports. Working Load Limit: 1000kg / 2204lbs, Breaking Load: 3800kg / 8377lbs.