Dial CO-AX Indicator Test Centering Alignment COAXIAL COAX Curved Straight .0005 Co-Ax Indicator Accuracy to Within .0002" of true center; .0005" Graduation ;250 Axis offset measuring range 6-7/8 Length;3/8" Diameter x 7/8" Long Shank;1/8" Diameter Feeler Ball Designed for centering a work piece of fixture;Operates at any angle Quantity: 1 ;Storage case overall dimension: 4-3/4''L x 8-5/8''W x 2-1/2''H