Locate two areas on the back of the letter to install the mounting hardware and mark them with a pencil dot. For most letters, you will position at least one one-hole wood frame hanger at the top of the letter and for others you'll position two at the top. Letters such as M, N, and T have enough room for two frame hangers at the top of the letter. Letters such as I or O would only have one hanger. Letters such as a P or F should have a hanger as close to the top as possible and a second hanger on one of the horizontal arms.
Place the letter face down on a towel. Position the one-hole wood frame hanger so that the round hole is located over the pencil mark.
Put the tip of the awl through the hole in the one-hole wood frame hanger and tap it with a hammer to create a dimple in the back of the wooden letter.
Replace the awl tip with a #6 screw tip and screw the one-hole wood frame hanger to the back of the letter. Repeat for the second one-hole wood frame hanger.
Hold the letter up to the wall in the desired position and locate the top of the triangular hanger at the top of the letter. Insert a finishing nail into the top of the triangular hanger and hammer a finishing nail into the wall at a slight angle to support the hanger.
Adjust the hang of the letter until you are happy with the effect. Locate the second one-hole wood frame hanger on the back of the letter and insert a finishing nail through the top of the triangular hanger. Hammer the finishing nail into the wall at a slight angle.