: A Crane Pulley Block is a kind of hoisting tool, also called a sheave, is a mechanism composed of a wheel on an axle or shaft that may have a groove between two flanges around its circumference.. Material: Zinc alloy. Advantage: Durable, strong, reliable, waterproof, anti-rust, anti-high temperature, corrosion resistance.. Function: Designed for hanging weight things to lighten load.. Multi-Usage: Widely used in tractive effort of steel wire rope or other rope tools..
