Chain shackles have straight shape so they"re intended for use in two-direction pulls. They are not a good choice for applications where there are more than two directions of loads, as it can create stress on the sides, increasing the risk of failure. If your application involves pulls from multiple directions, an anchor or bow shackle is a better choice.
The screw pin lets the user connect and disconnect quickly, so it"s excellent for temporary or attachments that change often.
A protective galvanized finish in zinc prevents it from corrosive substances. The zinc also protects any steel that becomes exposed from scratches or dings.