the tool for expanding a bore swab is a device adaptable for uses such as cleaning , as an applicator or for polishing the inside of a bore or cavity . one embodiment of the tool allows the insertion of a swab , smaller than the bore , into a work piece and provides a means to increase the radial size of the swab as needed . this is accomplished in one embodiment by forming or placing a swab on the tool , which includes a rod with a head and a sleeve . when the sleeve is moved in an axial direction towards the head , the swab expands in radial size . other embodiments are described and shown .