Lee Valley Top Star Crown Bit For Top Star Shim Screws

For use with our Top Star shim screws (sold separately), this two-piece crown bit engages both the collar section that surrounds the screw head and the screw simultaneously, turning both until the collar seats flush. By removing the outer crown portion of the bit, you can then turn the main Torx-drive screw shank alone, to adjust for plumb or level.