The central benefit of understanding and using the different types of surface roughness gage probes available is getting a better measurement. There are a number of measurements that can be completed using basic tools and the standard tool parts. However, when measuring surface roughness, you need to consider the context of the surface as well as the type of material being measured. Factors such as the design of the probe and the size of the probe radius will impact the accuracy of your surface roughness measurement as well as the safety of your material during the measurement process. Different surface roughness gage probe radii result in varying degrees of contact force. If you are looking for a lighter contact force, use a smaller probe radius. The shape of a surface roughness gage probe will be understandably different if you are gaging a flat surface as compared to a small bore as compared to a sharp edge. The benefit of having different types of surface roughness gage probes is that you are able to apply the proper tool to the proper measurement for increased precision and safety.