Johnson 1717-4800 Box Level, 48 in L, 3-Vial, Non-Magnetic, Yellow, Aluminum Nuts It changes to red and

It changes to red and an audible tone sounds when voltage is detected

Dual Controls

The powerful motor is engineered for constant speed for efficient mixing performance

Each blade features optimized tooth geometry and ultra-sharp carbide tipped teeth for crisp

FlexGuard closer protects door when over-extended and allows to open past 90 deg

Johnson 1717-4800 Box Level, 48 in L, 3-Vial, Non-Magnetic, Yellow, Aluminum Nuts It changes to red andDurable, accurate and ergonomic design of this box level is a jobsite essential. Its 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.