Seam Ripper Features:1) Sewing tools and accessories widely used for garment, embroidery, shoes and hats production2) Single and double head crochet hooks are made of steel and aluminum3) Crochet hook size: 0.5 - 10mm 4) Circle and straight hand knitting needles are made of porcelain or stainless steel 5) Hand knitting needle size: 2.0 - 10.0mmPacking (crochet hook): 1doz/box