Craftsman Professional 28129 8.0 Amp Corded 1/2" Hammer Drill A 10-foot cord gives you freedom to do a job far from an outlet The Craftsman kit comes complete with a depth stop rod, power cord and owner's manual Switch from rotary to hammer drilling with a single button. The powerful variable speed rotary is 0-2800 RPM; while the variable speed hammer drilling is 0-4480 A 1/2 in. keyed steel chuck allows you to tighten bits quickly and securely