High-quality, outside micrometer set allows precise measuring of crankshafts, pistons skirts, piston pins, valves, etc. Afford-able to the beginning racer or engine builder, six-piece set includes 0-1", 1"-2", 2"-3", 3"-4", 4"-5", and 5"-6" micrometers that measure to .0001". Sold complete with fitted wooden case.