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hand drill 
Gear-driven hand tool, used mainly to drill holes in wood, soft metal and plastic.
turning handle
Handle whose rotation turns the drive wheel, which in turn transmits the motion to the pinion and the chuck.
side handle
In horizontal drilling, it stabilizes the tool while the other hand rotates the turning handle.
drill
Detachable shank that is inserted into the chuck, whose rotating motion drills holes in various materials.
chuck
Device with jaws for attaching the bit or drill to the tool.
pinion
Small toothed wheel downshifting the turning handle’s motion: each turn of the handle translates into at least three rotations of the chuck.
drive wheel
Toothed wheel that meshes with the pinion, thereby transmitting its rotational motion.
main handle
In vertical drilling, it stabilizes the tool while the other hand rotates the turning handle.
jaw
The parts of the chuck that grip the tool to keep it firmly in place.
