Allen Key also called Hex Key or Allen wrench is an L-shaped tool used to drive bolts and screws with hexagonal sockets in their heads. Allen key has one long arm and a short arm design that offers extra reach on one end and extra leverage on the other.

Made of the hexagonal rod of hard steel, this tool is essential if you are working with Allen head socket bolts and precision automation projects. Precisely-sized ends are chambered to slide easily into the fastener, reducing wear on the wrench and damage to the fastener head.

Note: 

• The tool can be reconditioned using an electric grinder by removing the worn-out part, and then it works like a new tool.
• It is much more difficult to turn a damaged (rounded or otherwise) internal fastener, so use the correct hex key with the fastener.
• This is a Low-Cost non-returnable chrome-colored Allen key Set.
• The item might come with some torn-out chrome paint.