Kupo's Lightweight Telescopic Hangers are made of solid steel with a matte black powder coated finish, designed for mounting lightweight fluorescents, Led lights, or any lighting fixtures less than 33lbs (15kg) in weight. Features a safety wire equipped on the column for the iron casting clamp for added security, and a quick-release ball safety pin also prevents the riser from slipping.The iron casting clamp is for a pipe from 1-1/2"" (35mm) to 2-1/2"" (65mm) O.d., and the collar on the top of telescopic hanger keeps it safe for pan adjustment while the knob of the clamp is loosened. The stirrup head on the end of the telescopic hanger comes with clamps that can be mounted on the hanger directly..