Shaft Alignment Clamp Set Graduations 0.2 in Dial Gauge Range 0.25 in Dial Reading 0-50-0 Dimension Type Inch Included Indicator (2) 81-141J Includes (2) 81 141J/657Y Indicator (2) Chain Clamp (2) Extension Plate (2) PT18724 Snug Maximum Compatible Shaft Diameter 7 1/2 in Range per Revolution 0.1 in Reading Balanced Clamp Construction Anodized Aluminum Includes Case Yes Indicator Post Diameter 3/8 in Indicator Post Length 5 in 7 7/16 in 9 in