Insert the short end of the “L” into the slot on the fastener. If you’ve got the right size, the wrench will fit exactly and ...

An Allen wrench, AKA an Allen key or hex key, is a small hand tool used to fasten screws or bolts with a hexagonal socket.

Also known as hex keys, Allen wrenches are vital to any handyman's toolkit. They are formed from hexagonal-shaped steel rods ...