This part is used to connect the Bullet Mole to a jack hammer so that the jack hammer can drive the Bullet Mole. It basically has 2 holes in it. One larger hole that will slide over the impact cap and one smaller hole that will recieve the sawed off blunted, 1-1/8" hex bit connected to the jackhammer.  Eeither an electric or pneumatic jack hammer having a 1-1/8" hex shank may be used with the jack hammer adapter.

NOTE: An Idea is to use an old. worn steel bit and cut off the end so that it will be blunt.