【High-quality material】 Our greenhouse screws and nuts are made of high-quality aluminum, strong and sturdy, not easy to break, rust and wear-resistant, have no burrs, clear threads, good fastening effect, safe and fun to use, and have a long service life. 【Sufficient quantity】 Each set contains 50 pairs of screws and nuts, arranged in pairs, so you have enough to use during construction and to update and maintain the equipment in time. 【Easy to install】 Attach the back of the aluminum nut to the chassis mounting rail, and then tighten the components to be installed from the front. CSK hex nuts are used for tighter connections. Wide Application: This screw and lock nut set is suitable for the installation of machinery or mechanical devices, such as distribution frames and switches, or network cabinets and wall cabinets for similar installation techniques. Note: The data is all measured manually, please allow a deviation of 1-3 cm. Due to differences in lighting and display, color