Morse, DGAPC (129503), arbor pilot pin functions as a locator, positioning the hole saw where needed. The pin is slightly retractable, allowing for the cutting edge to engage with the surface of the material, enough to produce a cutting path for the hole saw. Once the surface is scored, pin can be removed, and the hole can be finished without a pilot drill, using the cutting path to guide the hole saw. One (1) arbor pin per card.