Dewalt DW124K 1/2 In. 300/1, 200 RPM 11.5 Amp stud and joist drill kit 100% ball-bearing construction provides durability and longer tool life. Mechanical slip clutch in low gear to prevent bit lockup and to provide control of reactionary torque. Adjustable front handle and 2-position side handle provide maximum leverage and control. Mechanically controlled two-speed to match RPM and torque to application requirement. Triple gear reduction provides increased torque and reduced gear stress. 21 In. overall length provides greater control and leverage.