1. Suitable for installing horizontal support arm on channel steel column 2. The adjustable space of the elongated hole is 50mm, which greatly improves installation flexibility 3. Stamping card position design, resist torsion moment 4. Tooth design improves anti-slip, shear resistance and impact resistance 5. 2 through bolts must be installed crosswise 6. Surface hot-dip galvanizing (zinc layer thickness 55um) 7. Material carbon steel stainless steel