Hex Wrench Hex Key Socket Wrench High Tensile Round Hexagon Body

Hex wrench is a hexagonally shafted tool used to drive bolts and screws with corresponding sockets in their heads. The term “hex key” has various synonyms, which include Allen wrench, Unbrako and Inbus key or wrench. Zeta key or wrench refers to the sixth letter of the Greek alphabet, reflecting the tool’s six sides. In the fastener industry, socket head and hex socket head are used to describe the fasteners a hex key turns. The terms hex-head and hex headed are often used informally. Ever Hardware provides custom-made fasteners and customizable packaging.
Characteristics
The tool is simple, small and light
The tool is L-shaped
There are six contact surfaces between bolt and driver
Advantages
The contact surfaces of the screw or bolt are protected from external damage
The tool can be used with a headless screw
The screw can be inserted into its hole using the key
Torque is constrained by the length and thickness of the key
Very small bolt heads can be accommodated
The tool can be manufactured very cheaply, allowing inclusion with products requiring end-user assembly
Either end of the tool can be used to take advantage of reach or torque
The tool can be reconditioned by filing or grinding off a worn end
Disadvantages
The hexagon is typically a smaller diameter than would be used with a corresponding external hex cap, making it more likely to round off its contact surfaces if over-torqued.
It is much more difficult to turn a damaged (rounded or otherwise) internal fastener than an external one.