A stationary pin or guide, which by inducing a localized change in yarn tension and/or temperature may be used to stabilize the position of the draw-point or neck in some processes of drawing of man-made-fibre yarns
Note: For the drawing of some fibre types, e.g., polyester, a heated pin may be used: with other types, e.g., nylon, the pin is normally not heated.
Textile Resource (http://www.textile.org.uk)