DEWALT DW124K 11.5 Amp 1/2-Inch Joist and Stud Drill 100 percent ball-bearing construction provides durability and longer tool life Mechanical-slip clutch in low gear to provide control of reactionary torque Adjustable front handle and 2-position side handle provide maximum leverage and control Mechanically controlled 2-speed to match rpm/torque to application requirement Triple gear reduction provides increased torque and reduces gear stress 21-inch overall length provides greater control and leverage