The Bosch PS41 12-volt Max Lithium Ion Impact Driver has the shortest head length in its class, at 5.4 inches, with a speed of 2,600 rpm and 930 inch-pounds of torque. It weighs two pounds, has a universal bit holder to accommodate any common configuration, and has a ring of three LEDs around the bit holder to illuminate the work area. The PS41 sells for $164.99.