Milwaukee's subcompact drill/driver (right) is much smaller than the author's 18-volt lithium-ion hammer-drill (left) and weighs about 3 1/2 pounds less.
Bosch and Ridgid have been competing for a while to produce the shortest subcompact. At the moment, it's Ridgid (far right) over Bosch (far left) by a hair.
The author mounted a new Irwin 3/4-inch Speedbor spade bit in each drill/driver, then counted the number of holes he could drill through 2-by Douglas fir per charge in high gear. He tested both of the batteries included with each tool.