Pulleys function as helper machines, easing lifting power. Pulleys reduce the force necessary to lift a very heavy object. These pulleys are metal framed with black plastic wheels, and can be used for science experiments as well as functional tasks.

This Triple Tandem Pulley contains three tandem pulleys with deep V-Grooves and two end hooks. Wheel sizes are 1 x 50mm, 1 x 40mm and 1 x 30mm, constructed from ABS plastic.