IPA 7880 Standard TDC Indicator, 7"
The TDC Indicator enables accurate setting of the piston to top dead center.
Just remove the spark plug, screw in the gauge, and rotate the engine, observe the gradation marks on the sliding shaft.
1/8" gradation marks
Installs as easily as a spark plug
Made of 1144 steel alloy with a stainless steel spring 14mm thread.