What type of hook allows for movement without twisting the hoisting line?

A swivel hook is designed to allow for movement without twisting the hoisting line. This feature is particularly important in lifting applications where the load needs to be maneuvered in different directions. The unique design of a swivel hook includes a pivoting mechanism that allows the hook to rotate independently of the hoisting line, which prevents the line from becoming twisted. This is crucial for maintaining control of the load and ensuring safety during the lifting process.

In contrast, latch hooks, while useful for securing loads, do not provide the same rotational capability. Alloy hooks and machinery hooks also do not inherently provide features that prevent line twisting. Their primary functions serve different purposes, such as strength or compatibility with machinery, rather than addressing the issue of line rotation during lifting operations.