The twist screw pin shackle is great for applications requiring a hook up perpendicular to the shackle. By having the shackle twisted 90 degrees, the shackle allows for attachments from the side rather than the front of the shackle. Made of durable Type 316 stainless steel and precision cast for quality, these shackles are ideal for marine and high moisture applications. The type 316 stainless steel forms a passive rust layer on the surface which does not accelerate to the core of the material making it more durable than galvanized shackles.