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The hole, which is six sided, is actually in the head of the Allen screw or bolt, NOT in the wrench. The Allen wrench is a six sided tool steel bar made to very precise measurements and often, but not always, bent at a right angle at one end. Professional Allen wrenches almost always have a large 'T' handle to use as a grip, and are about 7-9 inches long, as opposed to the smaller ones you find in hardware stores. The Allen wrench principle is to allow more torque on the screw or bolt. Many mechanics even have an entire set of Allen bits to fit on their torque wrench. Variations on the well known Allen head, (which has been around since 1912) are the modern Torx screw and the Bristol screw (much used in British aircraft industry) - All of these have a similar shape and a common principle of allowing more torque to be applied, and avoiding what is called 'cam out'.
A Torus is the mathematical term for a donut shape, that is to say, a circle with a smaller hole within the middle. The plural is toroids.
[despite the fact that this is under "rhetorical questions" I will answer it anyways] Man-holes are round because no matter which way you turn the lid, it will never fit into the round hole (With a slightly smaller diameter). If it were any other shape, like a square or triangle, it would be possible to drop the lid in the hole by turning it diagonally.
off course you can
There are many shapes: circles, ellipses, ovals (elongated circles), cardioids, any shape with a "hole" in it such as a annulus.Polygons will tessellate if combined with other suitable polygons.
hexagon
Hexagon
hexagon
Hexagon
a hexagon
Allen keys are hexagonal. The shape is a hexagon (6 sided figure).
The hole, which is six sided, is actually in the head of the Allen screw or bolt, NOT in the wrench. The Allen wrench is a six sided tool steel bar made to very precise measurements and often, but not always, bent at a right angle at one end. Professional Allen wrenches almost always have a large 'T' handle to use as a grip, and are about 7-9 inches long, as opposed to the smaller ones you find in hardware stores. The Allen wrench principle is to allow more torque on the screw or bolt. Many mechanics even have an entire set of Allen bits to fit on their torque wrench. Variations on the well known Allen head, (which has been around since 1912) are the modern Torx screw and the Bristol screw (much used in British aircraft industry) - All of these have a similar shape and a common principle of allowing more torque to be applied, and avoiding what is called 'cam out'.
If you look by the shifter console there is a little cap or lid remove this and inside the hole is a little flange, either use a screwdriver or Allen wrench and push down on it. This will allow the key to turn. I acually leave the Allen wrench in the hole because sometimes it will act up. hope this helps
You have to lift the car level and remove Allen wrench plug the fluid should be even with the hole
There should be a hole on the bottom of the disposal unit that an Allen wrench fits into. They are the ones that look like the letter "L". Insert the Allen wrench into the disposal unit and work back and forth until the motor breaks free. Then with a flashlight and patience you will need to fish the screw out.
Use a vice and when fully compressed, insert a tiny(very tiny) Allen wrench into the very tiny hole
With the key turned to on find something like a thin Allen wrench and push it in to the hole under the ignition and it should pull right out