This is an engine piston stop with a 14mm thread. It's a reliable tool for engine - related work.
To use this engine piston stop, first, make sure your engine is turned off. Then, screw the 14mm thread piston stop into the appropriate hole in the engine block. You can use it to hold the piston in place during certain engine maintenance tasks. When using, don't apply excessive force to avoid damaging the thread. After use, clean the piston stop with a dry cloth and store it in a dry place to prevent rusting.
