Use "lungers" in a sentence

1. Do not use cotton buds which are too big as these will act as plungers, packing the wax further into the car canal

2. He wanted to see if there were any plungers near the other boulders before he decided whether to pull it or not

3. The needles slid in, the plungers depressed, and the aides clicked the stopwatches

4. , The Plungers and the Peacocks: An Update of the Classic History of the Stock Market, William Morrow, New York, 1989