Patent ID: 8573906

Claim:
A guide assembly for guiding a spade drill as it drills a hole, comprising: a base plate having at least five holes, four of those holes being threaded; a spacer having four unthreaded holes and one threaded hole, each of the holes in the spacer aligning with a corresponding hole in the base plate; a bolt received in the unthreaded hole in the base plate and the threaded hole in the spacer for removably connecting the base plate and spacer; two insert guides for receiving shanks of spade drills, the insert guides being slidably received within corresponding unthreaded holes in the spacer, the outer diameter of each insert guide being smaller than the diameter of a hole drilled by a corresponding spade drill, with the outer diameter of the insert guide permitting the insert guide to fit snugly within a hole drilled by the outer diameter of the spade drill, each of the guide inserts having threads for connection within corresponding threaded holes in the base plate; and two guide rods having threaded ends to connect with corresponding threaded holes in the base plate.