Milwaukee 2290-23 M12 Sub Scanner/Drill Driver Combo,Milwaukee,2290-23" /> Measures depth and location of rebar up to 6 inches through concrete Detects location of wood, PEX, PVC, and metal Differentiates between steel (ferrous) and copper or aluminum (non-ferrous) metals Quick bit-loading 1/4-inch hex chuck for bit insertion and release with one hand Battery fuel gauge for displaying remaining run-time