AES operates on the principle of the Auger effect, named after the French physicist Pierre Auger. When a material's surface is bombarded with a beam of high-energy electrons or photons, it causes the ...

Twist drill A standard drill bit with two twisted, fluted cutting edges to remove material Wood Flat drill ... or larger diameter holes to be cut Wood Auger Has a wider twist than a normal drill.

Spoon augers were eventually replaced by an improved tool - the screw auger, although chair-makers used spoon augers into the 19th century. A spoon auger like this one requires a starting hole ...