Engine Camshaft Checking Fixture Kit Dial Indicator Universal Design For Use On Most Any Engine Block ProformNo more fumbling with a magnetic base and a dial indicator to measure cam lift. This fixture maintains and holds the dial indicator and 5 inch included extension in the precisely correct position over the lifters, assuring proper geometry. Supplied with . 50 Inch and 7 16 inch adapters for use with any engine block with the cylinder head off. Includes 0 1. 000 inch Dial Indicator P N 66962 that measures in 0. 001 inch increments. Sold as one kit.