You can bond these screw eyes into the holes of partially drilled items to make secure pendants, earrings, or dangles....or insert them into polyclay creations before baking. These measure 7mm X 3mm and crafted from brass, so they are substantial in weight. The ID of the loop is 1.4mm, the screw itself is .85mm. They do not contain nickel or lead. Each listing is for 25.