FeaturesThe needle can be struck with a hammer.Needle can be replaced without tools.Stainless steel springs are used for the spring drum to prevent rusting.Neodymium magnets are used to attach to steel parts.The main body is protected by elastomer resin for shock resistance.Lightweight, compact and easy to carry.SpecificationsBody size Jr. automatic winding: 87 x 82 x 27mmAutomatic winding: 87 x 82 x 27mm ●Swipita: 32 x 121mmProduct weight Jr. automatic winding: 120g, Swivel: 200gMaterial Jr. automatic winding: ABS resin, elastomer resin Spring: stainless steel Needle: spring steel Magnet: neodymium magnet Thread: nylonBody and tip: Iron Double ring: Stainless steel Rubber cover and protective cap: RubberThread length: 3.5mAvailable weight: 100g-400g