Johnson's durable and accurate 48 in digital box level is the perfect addition to your toolbox. its ez-read backlit display is highly visible on both the dimmest and the brightest jobsites, while the digital measurement reading will automatically invert for convenience when you are taking overhead measurements. this level can show five units of measurement - degrees, percent, in/ft (fractional), in/ft (decimal) and mm/m and has an accuracy of +0.1 deg at 0 deg/90 deg. durability is also never a concern with this level its rigid box frame resists deflection and twist, shock absorbing end caps protect the level when it is dropped and the solid block vials were designed to never fog, leak or crack. it comes with a soft sided pouch to keep your tool clean and safe when not in use.