This part is used to connect the Bullet Mole's impact cap to a jack hammer. It basically has 2 sizes of holes inside of the adapter. One for an SDS Max. and one for a 1-1/8" Hex shank. Simply slide the large end of the jack hammer adapter over the impact cap then insert the sawed off blunted steel bit from either an SDS max or a 1-1/8" hex bit. Eeither an electric or pneumatic jack hammer may be used.
NOTE: An Idea is to use an old steel bit and cut off the tip so that it will be blunt.