Profile gauge also known as contour gauge. It is the gauge used to copy any shape or surface. Profile gauge consists of stable stainless steel needles as shown in following figure.
Here is some most commonly used mechanical instruments for measurement in industries. Without this instruments I don't think any quality process possible.
Surface Metrology specify the function of the surface. The important parameter is surface roughness.In manufacturing industries, a surface must be within certain limit of roughness.