Below is a selection of FXR Series cam roller type linear guide products. These are highly customizable linear guides. The round raceway surface sheds dirt and debris that would otherwise inhibit the linear movement of the cam rollers. The cold drawn rails are made of carbon steel that is hardened via nitriding process. They are then post processed in a special way (i.e., proprietary NOX process) to create a very hard and durable, corrosion resistant linear rail that is black in color.