Universal Piston Stop Chainsaw Parts Clutch Flywheel Removal Disassembly Tool Condition: 100% Brand NewColor: Orange + BlackPackage Weight: Approx. 308g 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. The end is machined full radius to prevent damage to the top of the piston.Very easy to use and very handy to have around if you do your own saw or other 2 cycle work. Package Included: 1 * Clutch Removal Tool Set Note: We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)There are no instructions included in this kit. Professional installation is highly recommended!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.