Forgefix multi purpose pozi screws csk st zyp forgefix mps580y these forgefix multi purpose pozi screws with countersunk heads have a zinc yellow passivated finish for increased durability these screws are immensely popular and versatile and used in all trades including joinery electrical and plumbing also widely used in diy applications forgefix mps580y multi purpose pozi screw csk st zyp 50 x 80mm box 100