SAFE --- It is made of all plastic environmental protection materials, safe, strong and , and has a long service life. NEEDLE SIZE MEASUREMENT --- 20 kinds of rod diameter measurement, easy to calculate the number of needles and rows. Twenty measuring holes are used to determine the length between 1.5 mm and 10 mm. MULTIFUNCTION --- Knitting calculator is an indispensable tool when knitting pullovers and other clothing. It can help determine the needle gauge, calculate the number of needles and rows, and convert the number of needles and rows required for any required clothing size and yarn thickness. CLEAR SCALE --- The double-sided scale makes the needle count calculation clear and more convenient. USE RANGE --- Suitable for home use, patchwork, embroidery, clothing design, teaching, etc. It's a great gift for housewives and The knitting calculator is an indispensable tool for knitting and other clothing. It can help determine the needle gauge, calculate the number of needles and rows, and convert the number of needles and rows required for any required clothing size and yarn thickness. First, use the counting box to count the number of stitches and rows per 10 cm. Then, the slider of the knitting calculator can be set to the calculated value on the scale of 8 to 49 stitches per 10 cm. A viewing window directly displays the number of stitches and rows with a length of 1 cm to 100 cm. Size: 15x15cm(5.9x5.9inch) colour: as shown Material: plastic Package Contents: 1 x tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.