An apparatus may include an elongated hollow body with a plurality of skirts on one end of the elongated hollow body. An exterior of the elongated hollow body may have a plurality of fins. At least some of the plurality of fins may have a different diameter and/or placement along a length of the elongated hollow body. The elongated hollow body may be configured to receive a screw. The screw may be configured to expand the plurality of skins upon insertion into an interior of the elongated hollow body. The plurality of fins may be configured to secure the apparatus when the apparatus is placed within a bore. The plurality of fins may secure the apparatus at least by engaging the bore.
