Tin snips are shears which are designed to cut through thin sheets of sheet metal. While their design resembles scissors, they are much stronger, with heavier blades which are designed to make metal cutting as easy as possible. Many hardware stores carry tin snips, and there are typically several options to choose from; many people have several sets in their toolbox for different tasks.

There are three basic types of tin snips: left cutting, straight cutting, and right cutting. As the names imply, the set of the blades on each type cuts in a slightly different way. Straight cutting tin snips will cut in a straight line, while left and right cutting snips create curved cuts. Because sheet metal is stiff and hard to maneuver, it is often necessary to use curved tin snips to create curved cuts like holes for ductwork.

Most companies color code their tin snips to make it easy to know what kind they are. Typically, straight cutting snips are yellow, right cutting snips are green, and left cutting snips are red. The color-coding makes it easy to grab the right pair without inspecting the blade, which can be handy for people in a hurry. As a general rule, these colors are standard across the industry for convenience, although it never hurts to double check when purchasing a set of tin snips.

The best tin snips have offset handles, which create an angle between the blade and the hands of the user. This means that your hands are not caught on the edges of the metal as you cut, making cutting faster and safer. Even with offset tin snips, however, it is a good idea to wear heavy gloves when cutting sheet metal, because the edges can be very sharp, and shards of metal can act like splinters, penetrating your hands and causing pain and discomfort.

Like other bladed tools, tin snips benefit from regular care. The blades should periodically be wiped down and oiled to minimize the risk of rusting. It is also a good idea to sharpen tin snips occasionally to keep their cutting edges crisp, making cutting tasks easier and more comfortable. Many knife sharpening companies are happy to handle bladed tools like tin snips, and the blades can also be sharpened at home, for people who have the tools to do so.