Zinc-plated for corrosion resistance. Two tines bend during installation to create secure fixing. Includes assorted sizes: 30 x 2.2 mm, 22 x 2.2 mm, 22 x 1.5 mm, 19 x 1.3 mm & 10 x 1.3 mm. Removable and reusable fixing. Handy storage case with compartments.