Equickups

Machine
A machine is a physical system using power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecules, such as molecular machines. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement.

Impact wrench

David Marofsky and his auto salvage yard crew spend most of their time out in the yard yanking major components out of junk vehicles. So it’s no surprise that his tool of choice is a portable impact wrench. What does surprise me is that all the professional mechanics featured in this story routinely use battery-powered impact wrenches—and not just when they’re outside. In fact, David owns several of these workhorses and always keeps one near the hoist. “It hasn’t let me down yet,” he says. If you’re ready for power on the go and in the shop, check out a battery-powered impact wrench.

Ratchet

A ratchet consist of bar or wheel with a set of angled teeth that fits into the tooth allowing the movement in any one direction. There are adjustable ratchets, stubby ratchets that can be flexed to adjust so as to unwind a nut in any corner. One can easily understand how important these can be and why adjustment is required.