Metal piston stop with 10 mm and 14 mm threads suitable for 99% of all small 2 stroke and 4 stroke engines including chainsaws, brushcutters and cut off saws Fits the following Models:BR500,BR550,BR600,FS-130,FS-131,KM-100 For Metal piston stop tool for removing clutches/sprockets on chainsaws, trimmers, and blowers A brand-new, unused, unopened, undamaged item in its original packaging Metal piston stop with 10 mm and 14 mm threads suitable for 99% of all small 2 stroke and 4 stroke engines including chainsaws, brushcutters and cut off saws Fits the following Models:BR500,BR550,BR600,FS-130,FS-131,KM-100 For Metal piston stop tool for removing clutches/sprockets on chainsaws, trimmers, and blowers