oil scraper, put those three around the pin, like bottom ring, to one side of the pin, put the oil scraper on the other side, and then put the top oil scraper ring back where the bottom one was, for the 2nd compression right, put it 90 degrees away from either side of the pin, in the middle of the piston, and the top compression right 180 off of the other compression ring. pretty easy as mentioned before.