Box Treads are the horizontal part of the step that extends from the front edge of the stair nosing to the riser. It serves as the walking or stepping surface of the stair.
Retreads make stair remodels easy. Instead of building a new staircase, Retread stair parts serve to cover existing box tread – perfect for the DIY homeowner.
Risers are the vertical face of a stair step that your toes typically kick when you ascend to the next floor level.
Nosing is the front of the stair tread that protrudes beyond the riser. Nosing is placed over the horizontal edge of the stair where most foot traffic occurs.