An Allen wrench, or "hex key" is tool used to turn Allen screws or bolts. They come in various sizes, both SAE and metric, and may be single, or foldable into little sets that look like Swiss Army Knives. The heads are far more unlikely to strip out than Phillips or slotted screws, and are often used in, and included with "assemble it yourself" furniture like Ikea stuff. You just insert the end in the screw and turn. Lefty-loosey-Righty-tighty.
To fasten and unfasten Allen screws and bolts. These fasteners have a hexagonal slot in the top into which the Allen wrench or key fits.
9mm Allen wrench
You need a torx type socket. If you use an Allen wrench...you will strip out the inside of the bolt.
Torx or Allen wrenches get more torque (pressure) on the bolt.
I think that uses a 7mm Allen wrench.
An allen wrench is sometimes referred to as a hex wrench or hex key.
It would be a 14 or 17 mm wrench, not Allen key. Hardly any Asian cars use Allen keys.
You fit the Allen wrench into the socket in the centre of the motor shaft and turn it either way to dislodge the obstruction. Most disposals take a 3/16 inch Allen Wrench, but some may differ.
I believe that is a 7mm Allen.
That is a 3/8 Allen.
use an Allen wrench not a socket or open or box wrench.
7mm Allen wrench