- Accurately displays piston movement; Installs as easily as a spark plug
- 6 1/4" long (14mm thread) with 1/8" gradient marks
- Made of 1144 steel alloy with a stainless steel spring
- DO NOT use on an engine that has an acute spark plug angle relative to the flat top of the piston or you may bend the TDC shafts
- Made in the USA; Lifetime Warranty
- Accurately displays piston movement; Installs as easily as a spark plug
- 6 1/4" long (14mm thread) with 1/8" gradient marks
- Made of 1144 steel alloy with a stainless steel spring
- DO NOT use on an engine that has an acute spark plug angle relative to the flat top of the piston or you may bend the TDC shafts
- Made in the USA; Lifetime Warranty