HIGH EFFICIENCY: The end is machined with a full radius to prevent damage to the top of the piston. Very easy to use and very convenient when doing your own saw or other 2-stroke work. CLUTCH REMOVAL TOOL: This is a general piston stopper that requires the crankshaft to be held in place. SCOPE OF APPLICATION: Can be used to hold the clutch or remove the flywheel nut, or to repair power brushes and leaf blowers. EASY TO REMOVE: Simply remove the spark plug, screw in the tool and gently tighten. Remove the spark plug, screw the tool in place and press it lightly. EASY TO USE: Rotate the motor clockwise or counterclockwise until it appears that the piston is in conflict with the tool and it is ready to be repaired. Note that most chainsaws have threads to the left of theclutch side. Color: orange and black Package weight: approximately 308 grams Package includes: 1 x clutch removal tool set Tools for removing the chainsaw clutch We provide clear images and take measurements where possible. Check as much as possible to make sure the item is what you need. Due to manual measurement, please allow 0.5-1 inch difference. (1 inch = 2.54 cm) There are no instructions in this kit. Professional installation is highly recommended! Rotate the motor clockwise or counterclockwise until you feel the piston rest on the tool and you are ready to repair. Keep in mind that most chainsaws have left-hand threads on the clutch side.