Hylsnyckel

Hylsnyckel, also known as a socket wrench or simply a socket, is a type of wrench that uses a socket as a form of interchangeable tool head. Sockets are typically attached to a ratchet handle, allowing for continuous rotation without needing to remove and reapply the wrench after each turn. This makes them significantly more efficient for tightening or loosening fasteners than a standard open-end or box-end wrench.

The socket itself is a cylindrical piece of metal with a hexagonal or multi-sided opening at one end, designed to fit over a bolt head or nut. The other end has a square drive interface that connects to the ratchet or other driving tools. Sockets come in a wide variety of sizes, measured in both metric and imperial units, to accommodate different fastener dimensions. They can also have different depths, such as shallow or deep sockets, for accessing fasteners in various locations.

Ratchet handles are the most common driving tool used with sockets. They contain a mechanism that allows the handle to turn the socket in one direction while disengaging in the other, enabling rapid tightening or loosening without lifting the tool. Other driving tools include breaker bars for extra torque, torque wrenches for precise tightening, and impact wrenches for high-speed fastening. Hylsnyckel are essential tools in many trades, including automotive repair, construction, and general mechanical work.