Drill
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A drill is a tool used for making round holes or driving fasteners. It is fitted with a bit, either a drill or driver chuck. Hand-operated types are dramatically decreasing in popularity and cordless battery-powered ones proliferating due to increased efficiency and ease of use.
A lightweight magnetic-mount drill
A wooden drill brace and other carpentry tools including a mallet, plane, spokeshave, and rudimentary ruler) found on board the 16th century warship Mary Rose
Painting by Georges de La Tour of St. Joseph operating an auger
Carpenter using a hand-powered brace to drill a hole
Drill bit
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A drill bit is a cutting tool used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck.
From top: Spade, brad point, masonry, and twist drills bits
A set of masonry drills
Titanium nitride coated twist bit
Diamond-coated 2 mm bits, used for drilling materials such as glass