Contact me about availability.  Radii is a siding gauge for lap siding that has several features to increase efficiency in lap installation.  The key feature is being able to gauge laps accurately without perfectly placing the gauge perpendicular to the siding.  The gauge has an ergonomic polymer handle, is CNC milled out of aluminum, has an anodized coating, and stainless steel fasteners.  Using aluminum reduces the expansion and contraction you get from plastic gauges.  CNC milling produces highly accurate gauging without variances between gauges.  The handle is design to easily interface with the user. Sized for popular lap dimension of 5″, 6″, 7″, and 8″.