Rollblock

A rollblock is a type of pulley system used in rigging or lifting applications. It typically consists of a block with a groove or channel that guides a rope, cable, or line, allowing it to roll smoothly as it moves. Rollblocks are designed to reduce friction and facilitate the efficient movement of heavy loads by changing the direction of force applied to the line. They can be used in various contexts, including sailing, construction, and outdoor activities like climbing. The mechanism often allows for mechanical advantages, making it easier to lift or pull objects with less effort. The design may vary, but the primary function remains the same: to assist in the movement of ropes or cables in a controlled manner.