This break-away screw can be adjusted according to your needs, making it the ideal solution for installing handles and knobs. Richelieu's machine screws all comply with the Industrial Fasteners Institute's ASME B18.6.3 standards. Installation of these screws requires a #2 pozi or flat drive. Built with the metric system in mind, this screw's format is M4 x 50,8 mm. Finally, it is sold in packs of 12 units.