Optional badges★OptionalNo badge is required to use this tool. Earn this one to show you have learned the skill. Related Items Surface Plate Description This is a granite surface that is extremely flat. It is meant as a reference surface for measuring things on, and should not be used as a work table. Read more Comparator Description The Comparator is a precision measurement tool used in makerspaces to compare the dimensions of objects against a standard or template. Members utilize it for quality control, ensuring accuracy in their projects, and making precise adjustments to components in woodworking, metalworking, and other fabrication processes. Required Badge Comparator Read more More Videos (not required for the badge)