This Calculated Industries ConcreteCalc Pro (4225) Construction Calculator Armadillo is the perfect tool for professionals in the construction industry. With its handheld size and battery power source, it's easy to take with you on the go.

The calculator has a variety of features, including the ability to calculate concrete volume, weight per volume, and rebar size and spacing. It's also equipped with a built-in function for stair and riser calculations. The green plastic material and armadillo design make it both durable and stylish.