10lb. Sakrete Concrete Mix. Quality mixture of aggregates and portland cement. Exceeds 4,000 PSI when mixed and used as directed. Used to build and repair where concrete thickness exceeds 2". Ideal for placing footings, setting posts and poles, and building or repair of walkways, driveways, patios and steps, and more. Exceeds ASTM Spec C387. Packaged in a convenient tub for ease of mixing.