Drill Pilot Holes. A pilot hole works in conjunction with a screw-shank clearance hole. A pilot hole is a small-diameter hole bored into the bottom board.

Install the top and bottom brackets first and mount the rail to them. Attach the rail to the brackets with the screws and strap provided. Then add the bracket under the short horizontal section.

Drill a pilot hole on each mark through the paper (7). Expand the holes on both sides to desired size. The result will be a hole drilled directly through the center of the pole (8). Irwin is RF ...