Pre-Primed M.D.O. (medium density overlay) utilizes a TwoStep MDO along with primed overlays on two side. The Pre-Primed MDO is available with 1 working face. Panels with a single working face are provided with an MDO backer.
Strong, One-Piece Tempered Spring Steel Construction With Precision-Ground Tip Assures Gauge Will Grip Behind Siding Plank. No Adjustments To Vary And Nothing To Mark. Will Not Mar Finish Of Pre-Painted Siding. Works With 5/16" (7.9 Mm) Fiber Cement Siding. Permits 1-Person Application Of Panels. Two Gauges Support Entire Length Of Panel And Precisely Gauge A Standard 1-1/4 Inches (31.2 Mm) Overlap.
Flat head types have flat surfaces that taper toward the screw body to allow for countersinking. The flat head lies flush against the workpiece.
Square drive types, also known as Robertson™ s drives, have square recesses and are driven with square drivers. They provide added torque when needed.
Steel is strong and durable but less corrosion resistant than stainless steel. To improve its resistance to corrosion, it may receive additional finishes and coatings.