Pro Tram System by Edge Technology http://www.edgetechnologyproducts.com The Pro Tram is a machinist tool that allows you to easily square the spindle of your milling machine. With this gage the process of tramming is greatly simplified and can be completed in a fraction of the time compared to conventional tramming techniques. We guarantee that the Pro Tram will take the hassle out of tramming a milling machine. The Pro Tram system eliminates the need swing your indicator back and forth 180 degrees during tramming procedure. Just adjust the head until both gages read the same number and you can be certain that your spindle is perfectly square. Designed for use with Bridgeport style milling machines and CNC mills. • Large 2.2” easy to read indicator face. • Gage repeatability 0.0002” • Large 5" distance between indicators to ensure that the mill head is as square to the table as possible. • Calibration gage block included. • Large 1/2" shank. • Durable padded case included.