Striker plates are to be used when WARDFLEX®/WARDFLEX® MAX passes through studs, joists, or other building materials that limit the movement of the flexible piping. Striker plates are used to prevent damage to the tubing from nails, screws, drill bits and other puncture threats. Only striker plates provided by WARDFLEX® may be used with WARDFLEX®/WARDFLEX® MAX CSST systems. Ward Mfg WARDFlex® Striker Plate, Half, Steel, 6-1/2 in L x 3-1/4 in W, Domestic