A socket former is similarly shaped to a screwdriver, with a handle section and a shank, which includes the working part (expander section) of the tool.
Socket former handle
The end of the handle is flat; this is so the socket former can be hammered into the pipe.
The handle is thin and long, easily held in the hand and can be either round or hexagonal. As the tool is hammered in, it does not require a strong hold (like a screwdriver) and therefore it is not necessary to have added rubber for grip.
Socket former shank
Expander or driver section
The expander or driver section is not fixed at the head of the tool, but is loose and can move. This is beneficial so that the tool can easily be removed.
Head
Located at the end of the shank is the head, which stabilises the tool inside the pipe during use.
The expander or driver sections of a socket former can be doubled up on a single shank so that it is capable of forming two different diameter pipes. The double version can be seen to the left and the single above.
The expander sections of the tool are made up of a gradually inclining band with a higher and lower lip.