The Chain Block, commonly known as a hand chain hoist or block and tackle, usually featuring top and bottom hooks, the static top hook to suspend the hoist from a beam clamp or trolley, the bottom hook is the load hook, this is raised and lowered by simply pulling down on the hand chain, this then turns gears inside the hoisting unit to raise or lower the load. Both hooks feature safety catches to ensure that the load and the hoist is secure once suspended and lifting.