It is a genuine item that is supplied directly from the original equipment manufacturer for use with Jet and Powermatic power tools. A set screw is a type of screw generally used to secure an object within or against another object. Use a properly sized hex key also known as an Allen wrench to tighten or loosen this hardware. Keep in mind...Read more this high-quality item is made of durable metal and is sold individually. Please make sure to refer to the appropriate diagrams of your model for the correct location and application of this socket set screw.