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2. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   Flat-blade jeweler's screwdrivers and the tips found in 1 ⁄ 4-inch or 6.4-millimeter drive sets are generally hollow-ground. Note that it is this typical chisel shape which allows 9 screwdriver sizes to drive 24 different slotted screw sizes, with the drawbacks of not fitting as closely as a hollow-ground screwdriver would, and increasing the ...

3. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   These often have a hollow handle that contains various types and sizes of tips, and a reversible ratchet action that allows multiple full turns without repositioning the tip or the user's hand. A screwdriver is classified by its tip, which is shaped to fit the driving surfaces (slots, grooves, recesses, etc.) on the corresponding screw head.

4. Torx - Wikipedia

   en.wikipedia.org/wiki/Torx

   A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key. A Torx T8 screw head on a hard disk drive.. Torx (pronounced / t ɔːr k s /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron.

5. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   A breakaway bolt is a bolt with a hollow threaded shank, which is designed to break away upon impact. Typically used to fasten fire hydrants, so they will break away when hit by a car. Also used in aircraft to reduce weight. cap screw: The term cap screw refers to many different things at different times and places. Currently, it most narrowly ...

6. Torque screwdriver - Wikipedia

   en.wikipedia.org/wiki/Torque_screwdriver

   A torque screwdriver is a screwdriver with components that ensure tightening to a specified torque, ensuring tightening which is sufficient, but not excessive. An insufficiently tightened screw connection may loosen in operation, and excessive tightening can damage parts; for example, if the nuts holding the wheel of a car in place are too ...

7. Hex key - Wikipedia

   en.wikipedia.org/wiki/Hex_key

   Concerning the dissemination of the screws and wrenches, Hallowell said "the transition from a square head set screw [Hallowell refers here to the then-ubiquitous external-wrenching square drive] to a hexagon socket head hollow set screw[,] for which had to be developed special keys or wrenches for tightening or loosening the screw, was the ...