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2. Brace (tool) - Wikipedia

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

   The earliest carpenter's braces equipped with a U-shaped grip, that is with a compound crank, appeared between 1420 and 1430 in Flanders. [1] The brace has other names. Bit brace is the most often used name, but Carpenter's brace, ratchet brace (if a ratchet mechanism is incorporated into the design), and swing brace are also commonly used.

3. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   The gimlet bit is intended to be used in a hand brace for drilling into wood. It is the usual style of bit for use in a brace for holes below about 7 mm (0.28 in) diameter. The tip of the gimlet bit acts as a tapered screw, to draw the bit into the wood and to begin forcing aside the wood fibers, without necessarily cutting them.

4. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   It is a type of hand crank drill that consists of two parts as seen in the picture. The brace, on the upper half, is where the user holds and turns it and on the lower part is the bit. The bit is interchangeable as bits wear down. The auger uses a rotating helical screw similar to the Archimedean screw-shaped bit that is common today.

5. Robertson screw - Wikipedia

   en.wikipedia.org/wiki/Robertson_screw

   Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   double-ended screw dowel screw hanger bolt: handrail bolt: Similar to a wood screw but with two pointed ends and no head, used for making hidden joints between two pieces of wood. A hanger bolt has wood screw threads on one end and machine threads on the other. A hanger bolt is used when it is necessary to fasten a metal part to a wood surface ...

7. Bolt (fastener) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(fastener)

   Hanger bolt - Bolt that has no head, machine threaded body followed by a wood threaded screw tip. Allow nuts to be attached to what is really a screw. Hex bolt - Bolt with a hexagonal head and threaded shank. Section immediately under head may be unthreaded for fastening thicker materials. J bolt - Bolt shaped like the letter J, used for tie downs.