You can use these long thick bamboo marking pins by Clover as head pins, to temporarily hold together knitted or crocheted patterns before weaving or sewing the seams. Ideal for crochet or knitting projects made with thick yarn. These marking pins are made from bamboo, the same material as Clover’s Takumi knitting needles. One pack contains 10 bamboo marking pins, measuring 7cm long. Supplied per 1 pack.