Desc. = • Box beam construction with reinforcing ribs prevents twisting and bending under normal use • Precision milled on both surfaces for maximum accuracy • 3 shatter-resistant acrylic block vials read horizontal, plumb and 45° • Top read centre vial provides 300° viewing for easy readability • Oversized hand holes for sure grip • Shock absorbing beveled end caps • Bright yellow finish for improved visibility • Meets GS / TUV and CE standards