Wrenches and pliers are among the most basic tools. The open-end wrench (figure A) has an open face that slides around a nut or bolt. If you're using an open-end wrench, make sure the tool is the right size. These wrenches sometimes have a tendency to round off the corners on nuts and bolts. The next step up is the offset box wrench (figure B), which completely surrounds the bolt head. The offset angle also raises the handle so your hand has more clearance. You can get the best of both worlds with a combination set (figure C), which includes both an open-end and a boxed wrench. It's wise to get both metric and standard wrenches because you'll probably encounter both measuring systems. The ratcheting box wrench (figure D) is very convenient to use. The ratcheting feature allows you to leave the wrench on the bolt head and simply move it back and forth to loosen or tighten. Adjustable wrenches (figure E) have a thumb wheel that opens and closes the jaw. Like the open-end wrench, they tend to round off the corners of nuts and bolts. The self-adjusting wrench (figure F) is similar to a traditional adjustable wrench but locks into place once the handle is squeezed. It tends to offer a better grip than most adjustable wrenches. Needle-nose pliers (figure G) are good for work on electrical projects and include wire cutters. They're handy for helping you hold nails and avoid smashing your fingers. Tongue-and-groove pliers (figure H) slide up and down to accommodate different sizes of nuts and pipes. Wire cutters, also known as diagonal cutters or side cutters, have cutting blades on one side. They offer good leverage for cutting wires. Standard slip-joint pliers (figure I) can be adjusted for large or small applications. They're more limited than tongue-and-groove pliers, but they still come in handy. Locking pliers (figure J) can be tightened like a vise around bolts or other objects. They're great for holding things when you need a "third hand." A one-hand adjustable box wrench (figure K) offers the versatility of the adjustable wrench and the improved stability of the box wrench. The wrench is adjusted by a thumb wheel.
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