A cordless saw that out-cuts the rest
Milwaukee's corded Sawzall is the go-to reciprocating slicer for chewing through multi-layer wooden doors, 5-inch iron pipes, and other hardy materials. Now a cord-free version, the M18 Fuel Super Sawzall, cuts even faster than the original (3,000 strokes per minute versus 2,800). The lithium-ion battery pack can fuel up to 150 cuts per charge and runs 50 percent cooler than its predecessor. The company's hush-hush about exactly how it achieved these gains, but the saw's motor, battery, and electronics—everything down to the magnets in the motor and the total amount of copper—got a complete overhaul.

Sophie Bushwick