Bosch CLPK224-181 18-volt Lithium-Ion 2-Tool Combo Kit with 1/2-Inch Hammer Drill/Driver, Impact Driver, 2 Batteries, Charger and Contractor Bag Active response technology on the HDH181X gives superior control in bind-up situations The HDH181X is built tough with borsch exclusive Durashield housing and all metal gearbox to withstand rugged jobsite conditions IDH182 is an all-in-one impact driver and impact wrench with a 1/4-Inch quick-change hex and 1/2-Inch square drive chuck for sockets The IDH182 has up to 2 times motor life which gives superior efficiency for longer runtime and no maintenance Select between 3 speed and torque settings on the IDH182 to maximize power or minimize fastener damage