[R-390] bristol wrenches

[2002tii]

>Torx and other fasteners came about in an attempt to keep people from
>"arbitrarily" dismantling things in public places, and equipment where
>they do NOT need to be poking around, i.e., cell phones, hard drives,
>and other items.

The Torx drive system (in particular), as its name implies, was 
designed for the same reason as the Bristol drive -- to allow greater 
torque to be applied without stripping the drive recess in the 
fastener.  There is a "security" version of the Torx that has a pin 
standing in the drive recess, so the driver must have a hole in the 
end (see http://tamperproof.com/pdf/torx.pdf).

Many other drives have been specifically designed to be 
tamper-resistant (hex-with-pin, Phillips-with-pin, 3- and 5-blade 
Phillips, "tri wing," triangular recess, "Trident," "Theft-Pruf," 
pentagonal heads, "snake eyes," various "one way" heads, etc.).

Best regards,

Don