P390171 Prym “Jersey” press fasteners. Their easy to medium fastening strength and are intended for thin and stretch fabrics, as are often used in baby’s and children’s clothing. The advantage of this press fastener is that no hole has to be punched for mounting , the serrated ring only presses down the fabric so that it is protected. The fasteners are available in different colours and designs. The 18mm size press fasteners can only be worked on with the included tool however the 10 and 12 mm sizes can be worked on with the VARIO pliers for non-sew products or the tripod. 390171 smooth cap wh 12mm 6pc