Premium Material: These sewing pins are made from quality stainless steel material that is sturdy and stable with a smooth surface 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. Specification: Material: Stainless Steel Size Chart:Pins Length:11cm/4.33inch Storage Bag Size: 12.5cmx4.3cmx15.5cm/4.92inchx1.69inchx6.10inch Package Includes: 9 Knitting Pins 4 Connecting Wires 2 End Caps 1 Spacer 2 Crochet Hooks 1 Storage Bag Note: Please allow slightly errors 1-2cm differences due to manual measurement.