The 860 series box levels feature a 300 Degree high contrast center block vial viewing system to optimize readability from multiple positions. The reinforced acrylic block vials deliver long life visibility and help to resist breaking, leaking, or fogging. Precision steel milled edges coupled with a high strength aluminum box frame work congruently to maintain accuracy and durability in the most demanding environments. Impact resistant endcaps protect frame and vials. Oversized molded hand grips serve as ergonomic handles to provide both comfort and enhanced portability. 0.0005/inch accuracy in all working positions. Limited lifetime warranty.