Injection molded from transparent poly-carbonate plastic. The hook is tested to carry 200 plus pounds in extreme cold or heated environments. Transparent poly-carbonate plastic will not disguise voids that weaken plastic parts and will not absorb heat from the sun that can soften colored plastics. High quality control and field testing ensures dependability. They are 3/4″ diameter with smaller 5/8″ diameter ends, making loading easier. Fits up to a 2″ wide bucket lip.SOLD IN PAIRS.