Bosch Impactor Driver by Journal Staff • Aug 14, 2007 Print Print Bosch’s Impactor PS40-2 Fastening Driver may be only 6″ tall by 6-1/2″ long while weighing just 2.2 pounds, but its lithium-ion battery helps this 10.8-volt tool deliver 80 inch-pounds of torque. It sells for $199.