1. One feeder into yarn2. The elastic Shuttle(can buy two), which can knit different colors3. Each knit 6colors, and there are 13 colors exchange in the socks pattern4. It can knit high heel, big heel, small heel, left and right feet, 180 degree against sock month, twocolors for sock heads and socks heels.5. Can knit three-dimensional socks6. Pattern Depth up to 1, 200 courses.7. Taking the double shovle -needle technology, when knitting the heels and toes, the angles is adjusted by the computer, In this way, can improve the efficiency and overcome the shortcoming of single shovel-needle.