1- 12″ × 24″ × 1/2" piece of ply wood or MDF
you will also need a hand saw and a mallet.
After we put on the first side we need to add the handle because we will not be able to if we put the other end on. Start by sliding the tenon in the mortise then look on the out side and find the 2 slots in the end of the tenon. Place 2 of the 4 wedges in the slots and hemmer them in as far as they will go. Hammering in the wedges will cause the tenon to expand and be wedged in to the mortise.