examples of bits and drills 
While both are intended for drilling holes in various materials, the bit has a center point while the drill ends in a cutting-edge cone.
Bit designed for shallow holes of wide diameter; it has a long lead screw for positioning on the center of the hole.
Usually used to drill holes in metal or wood, it is the most common type of drill.
The carbide and tungsten tip, hard and durable, is designed to drill through material such as brick, concrete and stone.
double-twist auger bit
Bit made up of two opposing twists; it removes debris quickly as the hole is drilled.