No more fumbling with a magnetic base and a dial indicator to measure cam lift. This fixture maintains and holds the dial indicator and 5in extension (included) in the precisely correct position over the lifters, assuring proper geometry. Supplied with 1/2in and 7/16in adapters for use with any engine block. (With cylinder head off) Includes 0-1.000in Dial Indicator 66962 (0.001in)Proform Engine Camshaft Checker Tool 66830Specifications: Feature/Benefit No more fumbling with a magnetic base and a dial indicator to measure cam lift. Tool Type Camshaft Checking Tools Category Cam Check Tool Description_ABR Cam Tool Description_SHO Cam Check Tool Description_INV Cam Checking Fixture with Dial Indicator Description_DEF Engine Camshaft Checker Tool Description_ASC Engine Camshaft Checking Fixture Kit with Dial Indicator Description_ASC 0 to 1.000 Inch Range Description_LAB Engine Camshaft Checking Fixture Kit with Dial Indicator Description_LAB 0 to 1.000 Inch Range Description_DES Engine Camshaft Checking Fixture Kit with Dial Indicator Description_DES 0 to 1.000 Inch Range Description_EXT Engine Camshaft Checking Fixture Kit with Dial Indicator Description_EXT Designed For Use When Cylinder Head Is Off The Engine Block Description_EXT 0 to 1.000 Inch Range in 0.001 Inch Increments Description_EXT Universal Design Allows For Use On Most Any Engine Block Description_EXT Sold As One Kit Description_MKT No more fumbling with a magnetic base and a dial indicator to measure cam lift. This fixture maintains and holds the dial indicator and 5in extension (included) in the precisely correct position over the lifters, assuring proper geometry. Supplied with 1/2in and 7/16in adapters for use with any engine block. (With cylinder head off) Includes 0-1.000in Dial Indicator 66962 (0.001in)