#7880 TDC Indicator Standard 6.25" (14mm), Black

Worked great

Great tool. Heavy, solid, no slack, moves smoothly. -- After reading reviews on several of these, I was hesitant I would get anything of quality. Most reviews seem like seller warfare. -- This tool is meant to use while hand turning an engine. Exceeding the angle or using a key to turn it over quickly would be the only way I could imagine this too breaking. The rounded tip and spring loaded, smooth moving shaft should not have any issues on most pistons. -- I will be using this to help dial in all 8 cylinders and valve adjustments on a 351w. I was going to keep using my screwdriver, but thought this might be slightly easier for 1 person.

Works as it should it could bend if over force but take your time you will be fine.

I have used the piston stop device many times over the years and it works well. However, on most of my very old cars I have to be under the car to turn the engine so I have to get up and down a lot to make it work. With this device you can turn the engine while an assistant (aka wife) watches the indicator rise to the highest point where you stop. A little pricey but works well and is well made.My father used a wine cork and a screwdriver and that worked for him. I like to think I have come beyond that over my seventy five years.

Used for the first time and the shaft bent when rolled up to TDC on my Big Block Chevy. Had to throw away

Innovative Products of America 7880 6" Long 14mm Thread Top Dead Center IndicatorSweet heavy duty steel body, heavy duty brass plunger with movement markings at top of brass plunger for easy readings of movement of piston.Very impressed with the quality of this tool and sure you will be to.# Accurately displays piston movement# 1/8" 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.The TDC Indicator allows a technician to accurately set any position to top dead center. Just remove the spark plug, screw in the gauge and rotate the engine while observing the graduation marks on the sliding shaft. Note the top piston stroke.Buy this great tool with confidence.RagenRat

works fine on a straight hole over piston ,just dont use on a angle cylinder might get stuck or bent , but you should already know that

I was a bit skeptical because it's easy to use other ways. But it it super easy to put in and even more easy to see true TDC. I love it. My go to TDC checking tool.