Allen Key Metric Short Arm S Type Hex Wrench For Pro Grip Stud Hole Keepers

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 genericized use is discouraged by this company. The standard generic name used in catalogs and published books and journals is “hex key”. Ever Hardware provides custom-made fasteners and customizable packaging.

Some features of hex keys are:

• The tool is simple, small, and light
• The contact surfaces of the screw or bolt are protected from external damage
• There are six contact surfaces between the bolt and driver
• 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, so one is often included with products requiring end-user assembly
• Either end of the tool can be used to take advantage of reach or torque
• The tool is S-shaped
• The tool can be reconditioned using an electric grinder by removing the worn-out part, and then it works like new
• The hexagon is typically a smaller diameter than would be used with an external cap and is more likely to round off its contact surfaces.
• It is much more difficult to turn a damaged (rounded or otherwise) internal fastener than an external one.

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