Allen Wrenches Are Essential For Hex Bolts Allen wrenches, sometimes called Allen keys or hex keys, look different from most other wrench types. If you've ever bought and assembled IKEA furniture ...

EASY TO PICK: Supplied in composite case for safe storage and quick key selection. Each wrench for quick size selection and easy organizing.

They're so named because you need an Allen wrench (aka an Allen key or hex key) with a hexagonal socket to tighten them. The hexagonal shape provides six points to apply pressure to the fasteners ...