Centering Holders for Dial Indicators and Dovetail GuideA center holder is a device used to hold and position an object in the center of another object, often for the purpose of machining or manufacturing. It can be used in a variety of industries, such as metalworking, woodworking, and plastics manufacturing. Vogel Centering Holders for Dial Indicators and Dovetail Guide allows large cylinder diameters or holes to be centered suitable for all dial indicators and for dovetail guide made of steel, black