ACDelco Li-ion 18V 1/2" drill, No. ARD2081B, boasts 444 in-lbs. of maximum torque yet weighs less than 4.5 lbs. Includes metal gear housing, 20 torque settings plus drill mode, 1/2" (13mm) keyless chuck, two-speed gearbox, variable speed with reversible control and on-board battery meter. Anti-slip provides comfort and protection and includes an on-tool battery life setting.