ProLine® 100
ProLine® 100 is a very practical low cost Machine Tool straightness measurement package. Often ProLine 100 users add a sprit level (µLevel 20) at right angles in order to measure the „Roll Error” together with the straightness simultaneously.
If you also need to measure other things like squareness, level , flatness or pallalelism the you should check out the ProLine 200 or 300 instead.