Specification: B rand new Material: Iron Color: Orange Size(approx.): Piston Stop Plug Total Lenght: 60mm Piston Stop Plug Tread Diameter: 14mm Piston Stop Plug Hole Dia.: 8mm Clutch Expander Dia.: 45mm Clutch Expander Height: 35mm Fits for Baumr-ag SX38 38cc SX45 45cc SX62 62cc and SX66 66cc Chainsaws Usage Method: Step 1. To use, remove the sprocket cover from your saw. Step 2. Then remove the spark plug and fit the piston stop plug in it's place. Step 3. Next, spin the clutch to rotate the engine so the piston is touching the piston stop. Step 4. Then place the demount tool on top of the clutch so the three prongs on the clutch demount tool slot in the corresponding holes of the clutch and the bottom of the demount tool fit neatly and evenly flat on the top of the clutch. Step 5. Finally, using a 19mm wrench and socket or spanner, spin the tool and clutch counter-clockwise to remove the clutch. Package Included: 1 x Piston Stop Plug 1 x Clutch Expande Demount Tool N ote: Please allow minor error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.