DescriptionThe pulley block is a kind of hoisting tool, also called a sheave, a mechanism composed of a wheel on an axle or shaft that may have a groove between two flanges around its circumference. A rope, cable, belt, or chain usually runs over the wheel and inside the groove, if present. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion.Designed for use with rope or cord in indoor and outdoor application.Features- Brand: WINOMO.- Color: Silver.- Material: 304 Stainless Steel.- Size: About 3 * 2.5 * 7.2cm/ 1.18 * 1 * 2.83 inch(L * W * H).- Made of 304 stainless steel, durable.- Pulley rotation cylinder head is solid, durable, can rotate 360 degrees.- Dragging pulley, lifting pulley.- Surface light processing.- 304 Stainless steel Double Pulley Hanging wire towing wheel for driving fitness boat.