Step 1: POSITION
Place Step Doctor on existing tread or stringer.
Step 2: EXTEND WINGS
Extend wings flush to skirt board on both sides; tighten wing nuts.
STEP 3: CUT TREAD OR RISER
Remove Step Doctor and place on new tread or riser; mark and cut.
Position flat for tread.
Extend wings flush to skirt board.
Mark and Cut
Position on edge for riser.
Extend wings flush to skirt board
Mark and cut