KINGSTON KITCHEN & BATH INSTALLATION INSTRUCTIONS Shower Seat With Swing-Down Legs I: Tools required: Electrical screwdriver, masonry bit (1/8 and 1/4 inch}, punch. SS steel wood screws : 25.0 mm x 45~48 mm length provided by the manufacturer. Typical installation: The typical shower wall surround may wood stud frame, covered with gypsum drywall, tile board or plaster. The shower wall finish is usually ceramic tile.