GD-WSD,as a drugmless,double cylinder,fully electronic automatic socks knitting M/C,can knit various sock for man,woman,children,sports,designed plain,rib links and wrinkle pattern with high speed.also it operate knitting with 4 colors yarnfeeder changers by theirs sequance-exchange action.this model have so simple structure that it will bring very easy maintenance and high productivity to you.