Lay two 36-inch boards flat, parallel and with their outside edges 18 inches apart. Lay nine 18-inch boards flat on top of the 36-inch boards so they are perpendicular with their ends flush with the sides of the 36-inch boards. Space the 18-inch boards one-half-inch apart. The two outside 18-inch boards should be flush with the ends of the 36-inch boards. Screw the 18-inch boards to the 36-inch boards. Use all of the two-inch screws. This is your tool holder rack
Locate studs in the wall where you would like to hang your tool holder. Position the rack against the wall using your level to ensure the 18-inch boards are horizontal and the 36-inch boards are vertical. Screw two screws through each 36-inch board and into the studs. Use all of the four-inch screws for this task.
Set the fence on your table saw one-eighth of an inch away from the blade. Position the blade so it is three-eighths of an inch above the table. Run the 40-inch board across the blade with its 3.5-inch surface facing down. Keep its three-fourths-inch edge against the fence throughout the cut. You will have a one-eighth-inch-wide, three-eighths-inch-deep groove for the entire length of the board that is an eighth of an inch away from one of the edges.
Cut the 40-inch board into 10 pieces at 3 7/8-inches each with your miter saw. Drill four three-eighths-inch holes through three of these boards that are spaced three-fourths of an inch apart, and a quarter-inch away from the edge that is opposite the edge with the groove.
Slide the 3 7/8-inch pieces into the spaces between the 18-inch boards. The one-eighth-inch groove should be facing upward. The bottom edges of the 18-inch boards should fit inside the grooves on the 3 7/8-inch boards. These pieces of wood will hold your tools. Space them accordingly for holding your hammers, pliers or other woodworking tools. You will need two pieces to hold a hammer or large tools that are similar. Use the pieces with the holes to hold your screwdrivers, chisels and other similar tools.