- This is a piston stop for service that requires to hold the crankshaft in place. - Can be used for clutch service or flywheel nut removal or servicing weed eaters and leaf blowers. - Just remove the spark plug and screw this tool in it's place and lightly snug it down. - Turn the engine either clockwise or counterclockwise until you feel the piston come up against the tool and you are ready to do your service. - Remember that most chainsaws have left hand thread on the clutch side. - The end is machined full radius to prevent damage to the top of the piston. - The tool has a hot black oxide finish. Very easy to use and very handy to have around if you do your own saw or other 2 cycle work.
