Feature●Note: We have received long-term customer feedback. We independently design the screw and nut rod ourselves,●and can flexibly adjust the optimal installation effect through 2-end screws, making the installation effect more secure.●At the same time, we have different sizes (9mm to 20mm) for the nut rod part, which can meet the needs of different users.●Screw Head Material: H62 Brass●Screw Head: 7.1mm outer diameter x 7.5mm length. Effective thread 4.5mm●Nut Rod Material: Stainless Steel 303, rust proof and durable.●Nut Rod Size :5mm outer diameter x 14mm length,Description