Milwaukee 5387-20 - 1/2 in. Dual Speed Hammer-DrillChoose the hammer drill with power and speed controls for unmatched versatility. The adaptable Dual Speed Hammer Drill features an 8. 5 amp motor that provides overload protection, even when drilling holes in concrete. Choose controls in two ranges: 0 1,000 RPM 0 16,000 BPM or 0 2,500 RPM 0 40,000. Its versatile enough to drill in wood with flat boring bits, hole saws, auger bits and Selfeed bits or drill in steel with twist bits and in concrete with