Special seamless jersey -free press buttons are above all appropriate for finer fabrics, stretching such as clothes for babies or children. The "seamless" pressure buttons can be worked either with a hammer or for more ease with the vario or The tripod (allows pressure to be put far from the edges of the fabric). The more jersey-press button is that it does not require drill a hole to be installed: the integrated claw pimples postpone the fabric and allow So not to damage it. Washing, spinning, cleaning, iron or roller ironing does not pose any problem at Jersey stainless pressure buttons. A installation tool is included in each package. A guide is located on the back of the package. Boast of 6 pressures. Diameter: 13 mm. Color: White pearl. Matter: Brass.