Which of the following is a type of rigging hardware?

Shackles are indeed a type of rigging hardware, commonly used in rigging applications to connect various components of a lifting assembly. They are typically made of steel and designed to provide a secure attachment point for lifting slings and other rigging devices. The use of shackles is essential in ensuring the safety and stability of loads being lifted, as they can handle significant weight and come in various sizes and designs to accommodate specific rigging needs. Their strength and reliability make them a fundamental piece of equipment for safe lifting operations.

In contrast, chalk and crates do not serve the purpose of rigging hardware. Chalk is typically used for marking or measuring, while crates are containers used for storage or transport and have no role in the rigging process. Safety goggles, although important for the personal protection of workers in various hazardous environments, are also not classified as rigging hardware.