Bar-Clamp: (Quantity of 10), Two piece (each unit has a Right and Left piece) high strength aluminum hook suspends signs and mobiles from drop-ceiling T-Bars, holds up to 15 lbs. Suspends signs and mobiles from drop-ceiling T-Bars Holds up to 15 lbs. Two piece hook - Right and Left sides interlock to form 1/4" slot High strength aluminum material with a white enamel finish 1" Width x 1" Height