Many sanders trap sawdust only to spill it when you fumble with the clasp to empty the container. The bin on Bosch’s sander twists off smoothly like a bottle cap, so you won’t bang dirt loose. Bosch 5-Inch Random Orbit Sander $60; boschtools.com
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.