Commercial cherry pitters can be purchased from kitchenware suppliers. For pitting without a pitter, a good method that costs little and with a bit of practice becomes easy, is to use a plastic straw. Twist the straw into the cherry from the stem end while holding onto the cherry gently but firmly. Continue twisting to force the pit to pop out. The straw hole will cling to the pit, easing it out. See more instructions for pitting ideas, with images, at: How to Pit a Cherry.