These SHENGHUISS Anchor Shackle Stainless Steel 316 Forged Bow Shackle Screw Pin Marine Hardware Rigging are made of high quality 316 stainless steel, which is highly resistant to corrosion and rust in the marine environment. The shackle has a large opening for easy attachment of ropes or chains, and is designed to provide maximum strength and durability. The screw pin is made of durable stainless steel and is designed to provide a secure and reliable connection between the shackle and other marine hardware. The shackle is ideal for use in a variety of marine applications, including boat anchoring, marine rigging, and marine construction.