This is a genuine manufacturer-approved component which is specially designed for Jet and Wilton equipment. The purpose of this pulley is to apply tension to the belt. It provides an identical replacement for a missing or a faulty part that was installed on a new unit. Please make sure to refer to the appropriate diagrams of your model fo...Read morer the correct location and application of this arbor pulley. It is a high-quality part is made of durable metal and is sold individually.