piston stopper 12mm thread for spark plug type D, DC

Piston stopper for Aprilia DiTech and Piaggio PureJet engines or engines with 10mm spark plug thread. Locks the crank allowing you to work on the piston. Screws into the spark plug thread.
Take care when loosening or tightening threaded connections. Rotate piston to the stop first. Can damage the piston if not used correctly.