[. . . ] Update 01/2004 The TWISTER Features of the BEITER TWISTER: The Beiter Twister is a tool, to easier serve a serving with the Beiter Winder. [. . . ] (pic. 1) Than it can be engaged and used as to serve the serving faster, tighter and more accurate. (pic. 2) A third option is that you can open the serving - without losing tension -, if you served too much or in the wrong way. (pic. 3) The Beiter Twister can be ordered as a single spare part (and used an all Beiter Winder already on the market), but it can be also ordered in combination with the Beiter Winder. Install the Beiter Twister on the string and turn the black cap so, that the Beiter Twister can not leave the string (pic. 4). [. . . ] 4 Code-numbers: WIETWISTERBL -> Winder, Twister Blue , WIETWSITERGRBL -> Winder, Twister for Winder Profi pic. [. . . ]