Leo?s binding screws are perfectly suited for the production of sample fans, color cards or presentations. They are always delivered in pairs, i.e. one binding screw consists of a shaft and a screw. Usually the shaft?s diameter is 5mm, so a hole diameter of 5, 5mm is perfectly right (this does not apply to our sample fan screws). Especially our nickel-plated screws are putting the final touch to your product. By means of washers you can easily level small differences in the height of your product and the screw. We are also prepared to provide small quantities!