Press fasteners · Knipper®   radial spring · Ring spring · S spring · FlexFix® Waterproof WetStop® systems Jeans products Special closure and fastening systems Eyelets, rivets, shoe accessories Fashionable accessories Automotive Attaching machines WorkWear	Press fasteners Knipper® DUA system Fields of application • Standard quality for all customary clothing industry on stretch   fabrics and knit goods • Suitable for light to medium mechanical loading of the   press fastener system Attaching instructions • Manual, semi-automatic and fully automatic processing   (attachment) without pre-punching the material Design options • A wide variety of design options for caps: galvanic or lacquered surfaces, caps with plastic top,   die-cast zinc caps, caps in fashionable design or with custom embossing Special features • Positive anchoring in the material with five prongs which penetrate the fabric without damage • Flat look to press fastener combination set • DUA 36 system in stainless steel version, capable of withstanding the laundry and dry   cleaning processes used by commercial laundry rental services • Available in system sizes DUA 12, 14, 15, 16, 33 and 36 You will find detailed information in our brochure entitled "Knipper® closure system - Selection and attaching instructions," which you can order here.