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2. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   A popular use of hand-held power drills is to set screws into wood, through the use of screwdriver bits. Drills optimized for this purpose have a clutch to avoid damaging the slots on the screw head. Pistol-grip drill – the most common hand-held power drill type. Right-angle drill – used to drill or drive screws in tight spaces.

3. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Masonry bits up to 1,000 mm (39 in) long can be used with hand-portable power tools, and are very effective for installing wiring and plumbing in existing buildings. A star drill bit, similar in appearance and function to a hole punch or chisel, is used as a hand powered drill in conjunction with a hammer to drill into stone and masonry. A star ...

4. Jackhammer - Wikipedia

   en.wikipedia.org/wiki/Jackhammer

   The drive piston never touches the flight piston. Instead, the drive piston compresses air in the cylinder, which then propels the flight piston against a striker, which contacts the drill bit. [21] Electric powered tools come in a variety of sizes, about 12–65 lb (5.4–29.5 kg).

5. Power tool - Wikipedia

   en.wikipedia.org/wiki/Power_tool

   The most common types of power tools use electric motors. Internal combustion engines and compressed air are also commonly used. Tools directly driven by animal power are not generally considered power tools. Power tools can produce large amounts of particulates, including ultrafine particles. Airborne particulate matter is a Group 1 carcinogen.

6. Chuck (engineering) - Wikipedia

   en.wikipedia.org/wiki/Chuck_(engineering)

   A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools. This type of chuck is used on tools ranging from professional equipment to inexpensive hand and power drills for domestic use.

7. List of instruments used in otorhinolaryngology, head and ...

   en.wikipedia.org/wiki/List_of_instruments_used...

   Electric drill: for bone drilling Mollison's self-retaining haemostatic mastoid retractor: used in mastoid surgeries to retract overlying tissues Staecke's guide and protector: used in mastoid surgeries Chisel: removing parts of bones Mastoid gouge: removing parts of mastoid bones MacEwen's cell seeker with curette: used to curette within the ...