Mitutoyo Swivel Clamp & Holding Bar Set This set is designed to allow you to hold indicators with your Mitutoyo height gages. You can hold a drop indicator with your height gage to measure groove depths or step heights. You can also hold a test indicator with this set and a height gage to measure flatness. Includes the following types of Indicator holders... 0.157" Stem or Post 3/8" Stem or Post Dovetail Combo Set includes... 0.315" / 8mm Diameter x 4.5" / 115mm Long Holding Rod Swivel Clamp