The hoists are designed for use in confined and enclosed spaces, while the effort required on the lever to lift a full load is 20.20 lbs., 28.10 lbs., 41.50 lbs. and 42.70 lbs. respectively.

Introduction Have you ever wondered how ancient people could lift very heavy objects, such as large stones, to build pyramids? A lever is a simple machine that can help people do just this.