Hex key. A hex key, Allen key or Allen wrench is a tool used to drive bolts and screws with hexagonal sockets in their heads. The Allen name is a registered trademark, originated by the Allen Manufacturing Company of Hartford, Connecticut circa 1910, and currently owned by Apex Tool Group, LLC. Its genericised use is discouraged by this company.
Lineman's pliers (US English), linesman pliers (Canadian English) , combination pliers, side-cutting pliers, or Kleins (generic trademark) are a type of pliers used by linemen and other tradesmen primarily for gripping, twisting, bending and cutting wire and cable.
open-end wrench: open-ended spanner: A one-piece wrench with a U-shaped opening that grips two opposite faces of the bolt or nut. This wrench is often double-ended, with a different-sized opening at each end. The ends are generally oriented at an angle of around 15 degrees to the longitudinal axis of the handle.
The most prevalent form is the ratcheting socket wrench, often improperly called a ratchet. A ratcheting socket wrench is the device within a hand tool in which a metal handle is attached to a ratcheting mechanism, which attaches to a socket, which in turn fits onto a type of bolt or nut.