Constructed from drop forged steel with black powder coated the 10” c-clamp comes with an adjustable 1-1/8”(28mm) junior receiver that allows you to rig lighting fixture while mounting this clamp in both vertical or horizontal way. The safety wire is built with the clamp to ensure this essential safety aid is always on hand. Safety pin is attached with safety wire to keep it safe for pan adjustment of light fixture while the knob of clamp is loose.