This tool has been designed specifically for placement of eyelets. The awl is first used to make starter holes where eyelets are desired. The eyelet is then slipped over the awl insertion pin and pushed into place. It provides an extremely simple method of making electrical connections in hard to reach dollhouse locations. A hollow compartment in the metal shank provides storage for the four insertion pins. Overall length is approximately 5 ⁄8". Instructions are included on the package. You have the option to purchase Awl Replacement Pins.