[Premium Material]:These sewing pins are made from quality stainless steel material that is sturdy and stable with a smooth and fine workmanship [Pin Set]:With 8 different sizes of knitting pin (2.0mm,2.25mm,2.5mm,2.75mm,3.0mm,3.25mm,3.5mm,3.75mm,4.0mm),can meet your different needs [Detachable Design]:The knitting hooks feature a detachable design that allows users to freely combine and adjust the length and size of pins according to their needs [Wide Application]:Circular knitting pin cable is in interchangeable design Great for arts,crafts work,sewing,and beading jewelry making [Great Gift]:This pins set would gift for anyone who is learning to crochet,a beginner just starting out,or a seasoned crocheter