Which two types of shackles are commonly used in rigging?

In rigging, the two commonly used types of shackles are the bow type and the D-type.

The bow shackle is distinguished by its rounded shape, which allows for multiple load connections and the ability to accommodate larger or bulky items due to its wider opening. This makes it suitable for conditions where different rigging components need to be connected without the risk of binding or chafing.

The D-type shackle, also known as a delta shackle, features a more rectangular shape resembling the letter "D." It is mainly used for situations where a strong, direct pull is required. The design of the D-shackle allows for more efficient load distribution and is typically used in applications that require a high degree of safety and strength.

Both of these shackles are favored in rigging applications because they are designed to handle heavy loads safely and efficiently. They are critical components that help ensure the integrity of lifting and rigging systems.