
Same as the other one I posted (steel one), expect this group I bought from a different seller and has the highly rounded, smoothed stopper tip.
if your motor uses a standard head (angled spark plug) and's/or you need the stopper to wrench on the engine, such as taking off clutch/crankshaft/sprocket/gears without needing an impact wrench- then this has the potential to be safer on the engine (unlikely to ever dent/damage the piston crown, even in these non-ideal uses). Both types are the same price. Plastic (nylon) piston stops for sale too- since they’re not a hard enough material to risk dent/scratching anything!
ALSO- finely adjustable piston stops are also available on the site- which I machined specifically for the site. There is one plastic (nylon) and one steel adjustable stop type- but both are the same design/shape and both can be locked at a precise stopper/piston height for porting purposes.