Durable, accurate and ergonomic, this box level is a jobsite essential. It’s reinforced aerospace aluminum alloy frame provides the durability needed on even the roughest jobsite, while the magnified domed vials provide 320 deg visibility and feature Johnson’s patented Glo-View technology, so they glow in the dark to maximize vial readability.Patented Glo-View recharges the vial surrounds from light sources for easy-read in low lightGuaranteed accuracyLarge comfortable rubberized hand gripsReinforced aerospace aluminum alloy frameRemovable end caps designed for finish carpentry work when measuring into cornersGripTight non-slip end caps hold level in place with just one hand