A ratchet wrench is a handy tool used for tightening or loosening nuts and bolts. It features a unique mechanism that allows the user to turn the handle in one direction while the socket remains fixed in place. This design makes it easier to work in tight spaces, as you don’t have to remove the wrench after each turn. The tool typically comes with interchangeable sockets, which fit various sizes of fasteners. This versatility makes ratchet wrenches popular among mechanics and DIY enthusiasts alike. Whether you're working on a car or assembling furniture, a ratchet wrench can save you time and effort.