Accurately displays piston movement;1/8 inch graduation marks;Installs as easy as a spark plug;Made of 1144 steel with a stainless steel spring;Lifetime warranty; made in the U.S.A.

• Innovative Products of America 7880 6 Long 14mm Thread Top Dead Center Indicator

Innovative Products of America 7880 6 Long 14mm Thread Top Dead Center IndicatorInnovative Products of America