Koch's Swivel Eye Cable Block / Pulley is for guiding rope or cable in various mounting applications (fixed or movable).Size / Maximum Work Load: 1-1/2" with max. wire/rope size of 3/16" = 420 lbs2" with max. wire/rope size of 3/16" = 480 lbs2-1/2" with max. wire/rope size of 1/4" = 550 lbs3" with max. wire/rope size of 1/4" = 850 lbs3-1/2" with max. wire/rope size of 5/16"= 1, 250 lbs | Koch Swivel Eye Cable Block / Pulley | Size 3-1/2"