Material: The d screw shackle is made of 304 stainless steel for maximum corrosion resistance and durability.Size: Quantity: 6pcs, Weight: 339g, the detailed size is in the picture, because it is manual measurement, there will be 0~3mm error. D The shackle has a strong bearing capacity and is sturdy and durable.Features: Type D shackles are narrow chain ring shackles, usually with a cotter pin or threaded screw closure. Make sure the pin is screwed into the hole in the shackle: hand-tighten, then secure with wrench or other suitable tool. Make sure the shackle is carrying the load correctly, i.e. along the axis. Avoid bending loads, unstable loads and overloads.Application: Steel straight shackles, U-shape shackles, widely used in anchor chains, sailboat accessories, trailers; can be connected with chain and rope accessories. Robust and weatherproof, it can withstand bad weather.