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2. Countersink - Wikipedia

   en.wikipedia.org/wiki/Countersink

   In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt , screw or rivet , when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat ...

3. Airstone - Wikipedia

   en.wikipedia.org/wiki/Airstone

   A spherical airstone at the Osaka Aquarium alongside a trio of red stingray pups, Hemitrygon akajei. An airstone, also called an aquarium bubbler, is a piece of aquarium furniture, traditionally a piece of limewood or porous stone, whose purpose is to gradually diffuse air into the tank, eliminating the noise and large bubbles of conventional air filtration systems, and providing other ...

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   In wood, the brad point drill bit is another solution: the center of the drill bit is given not the straight chisel of the twist drill bit, but a spur with a sharp point, and four sharp corners to cut the wood. While drilling, the sharp point of the spur pushes into the soft wood to keep the drill bit in line.

5. Senate Democrats name top leadership positions after losing ...

   www.aol.com/senate-democrats-name-top-leadership...

   Senate Majority Leader Chuck Schumer, D-N.Y., arrives for the Senate Democrats' leadership election in the Manfield Room in the U.S. Capitol on Tuesday, Dec. 3, 2024.

6. Six Rutgers students accused of running drug ring with app ...

   www.aol.com/six-rutgers-students-accused-running...

   Alumnus Anudeep Revuri, 23, of New Brunswick, allegedly developed the closed network used by the group to sell narcotics to other Rutgers students.

7. Brace (tool) - Wikipedia

   en.wikipedia.org/wiki/Brace_(tool)

   If the bit's lead and cutting spurs are both in good working order, the user should not have to apply any pressure other than for balance: the lead will pull the bit through the wood. Bits used to come in a variety of types but the more commonly used Ridgeway and Irwin-pattern bits also rely on a tip called a snail, which is a tapered threaded ...